stm32 blue pill vs esp32

Personally, I see myself would use it more and more for my projects. ST’s website requires you go through a registration and email verification process before you could download the STM32CubeProgrammer, I have difficulty in email verification process as it doesn’t work well on Safari (or with the ad blocker) and eventually I have to use Firefox to download STM32CubeProgrammer. There are many sites talking about fake STM32F103C8T6 or fake Blue Pill, what they means fake was that a few years ago, there are some STM32 blue pill (and other products) from China come with a chip marked as GD32F103C8T6, produced by a Beijing-based company GigaDevice, it is a direct drop in replacement of STM32 but claims to be able to run even faster speed. There is no protection in place. If you just want the WiFi connectivity, I would use whatever board you're comfortable with and integrate an ESP8266 - 01 for the WiFi aspect. your code is likely waiting for serial to start. The ESP32 uses the Xtensa 32 bit processor. So which one to use, my suggestion is to use STM32duino as it seems now officially backed by ST, and it try to fully compliant with Arduino’s APIs. You can program the Blue Pill using the Arduino IDE, just like how you can program the ESP8266 and ESP32 breakout boards. I assumed that the power-indication LED consumed the same current as the blinking LED. Right now these are in short supply or too expensive for the STM32 kit. STM32 is a serious replacement of any Arduino boards. So this means the LED consumed about 26.6-24.2=2.4mA. However, this is not the case for STM32 Blue Pill, the build-in USB port is more or less for providing power only because by default it does not come with the boatloader for programming via USB port. As you can see each pin is neatly labeled against it. Lucky me! If you are using PlatformIO for programming STM32 Blue Pill, you will need to configure the platformio.ini to use serial as the upload protocol. The module operates at 3.3V but its SPI pins are 5V tolerable. Much more than reading an encoder in software I haven’t been able to do with the BluePill, unfortunately the speed is just enough to count, I don’t have the time for the rest of the program , Your email address will not be published. We have assumed that the STM32 is already in boot mode before flashing the code (Step 1 & 5 in Usage section). Commonly referred to as the STM32 Blue Pill, this board has nearly all the capabilities of the Arduino module but with a cheaper price. You could implement it on your ESP32. STM32 Blue Pill libopencm3 port of MicroPython - a lean and efficient Python implementation for microcontrollers and constrained systems. How noise it is giving that it running at 72MHz clock frequency? there is probably a line like: 3.3/4096=0.805mV resolution), which is same as ESP32 ADC, and much better than Arduino Uno/Nano’s 10-bit over 5v (5/1024=4.88mV resolution). The board operates on 3.3v logic levels but its GPIO pins have been tested to be 5v tolerant. STM32F103C8T6 STM32 (Blue Pill) Board: Before Getting Started with STM32 Microcontroller, we need to know about STM32. If the board is reset again while the Boot0 is still at 1, the code will be erased, so once development is complete, both Boot0 and Boot1 need to be set to 0 so that the code is run immediately after power on or restart. If you are not limited to the Blue Pill device there are also STM32 evaluation … Do not connect 5V between programmer and STM32 if you are supplying voltage via USB as STM32 Blue Pill does not have power protection circuitry and this will damage your STM32 Blue Pill. The board naming convention is also different under the different platform selection. The microcontroller has one USB port (without extra chip support), three UART ports, 16-bit PWM pins plus more. Because the long history of Arduino STM32 developed by Roger Clark, most of the online tutorials are based on this implementation, what make things worst and further confusing is that some of the websites refering Roger Clark’s Arduino STM32 as STM32duino! Launch PlatformIO, and click on PlatformIO home icon and click on ‘Platforms’ and search for ‘ST STM32’ as shown in the photo to install the STM32duino core. Don't know how complete it is, but most basics seem to be covered. ... For many years now, the so-called ‘Blue Pill’ STM32 MCU development board has been a … I did read that the next round of esp32-wroom-32se devices will have an IC to handle hardware TLS 1.2. Arduino STM32 was the one I first installed. With all that said, when it comes to making a purchase decision, beginner would start purchase with STM32, as it can be reused for more complex projects in the future. The modules when operated efficiently can cover a distance of 100 meters.. Since almost all the tutorial and setup guide say you will need one of those ST-Link programmers in order to program the STM32 Blue Pill, and STM32 Blue Pill is designed with dedicated header pins for interfacing with ST-Link, so I bought mines from China, but unlucky me, it came as Dead-on-Arrival (DOA), both Windows and Mac computers can’t detect the ST-Link USB, so I eventually ship it back for refund. But without wireless, as featured in the ESP8266 or ESP32 which have built-in Wi-Fi, its application is limited without external networking hardware, it may not be the best choice for Internet of Things development. They are using an ATECC608A IC to accomplish this on the I2c bus. However, there are cases where it makes more sense to choose one … Like I said, I’m just starting this rabbit hole, so little things and nudges might help me a lot! A Better Arduino IDE – Getting Started with PlatformIO, How to get the best ADC accuracy in STM32 microcontrollers, Measure pH with a low-cost Arduino pH sensor board, Do you know Arduino? This could happened when you power your board via USB and at the same time your connect to your programmer which also provide the power source at the same time. Please change PB1 to PC13 in the code, as our builtin led is connected to pin 13 on port c ( other boards may be different ) So GigaDevice is not the only one that produces fake STM32F103C8T6 in China. As at the begining of 2020 now, GigaDevice is still around, and it still not distributed or listed at any online compoent e-commerce platforms that operated outside of China but its GD32F103C8T6 is certainly listed on LCSC (A Shenzhen-based e-commerce platform for components) for $1.6 for quantity of 1 and $0.88 for quantity of 1000+ (for comparison, STM32F103C8T6 is priced at LCSC at $1.76 for quantity of 1 and $1.01 for quantity of 1000+). I want to STM32f103c (Blue pill) board to communicate with esp8266-12E and neo 6m GPS modules with blue pill. The datasheets of STM32 contains all the information. The thermistor that I used for running the ESP32 ADC test is still on my desk, so I’m interested to find out how STM32 ADC perform against Arduino and ESP32? STM32duino wiki provided detail “Getting Started” guide on how to setup the Arduino IDE for STM32duino programming. Right click on the app, and select “Show Package Contents”, then navigate through the directory Contents/MacOs, and double click on “SetupSTM32CubeProgrammer-x_x_x_macos” to launch the installer, and follow the instruction. Getting started with STM32 development isn’t as smooth as setting up an Arduino or ESP32 for me for various reasons, and I hope my experience in setting it up, and the things you need to be aware of will help any one interested with this article. STM32 Blue Pill ARM development board first look: from Arduino to bare metal programming. Blue Pill and other STM32 microcontrollers have an onboard Real Time Clock. I nowadays seldom use Arduino IDE, PlatformIO is a much better IDE for Aruidno/ESP32 and also STM32 programming. A while back, I completed a port of the open source OnStep Telescope Controller firmware to the STM32 Blue Pill ARM Cortex M3 32-bit MCU. There are plenty of dsp libraries for the STM32 line. What this means is that DO NOT POWER THE BOARD THROUGH USB AND AN EXTERNAL POWER SUPPLY VIA 5v PIN AT THE SAME TIME. Perhaps higher end stm32 devices can handle it at a software level, but they cost more. Disclaimer. It is a 3.3V microcontroller, but some of its pins are 5V tolerant. So I quickly connect the thermistor between the STM32 A01 pin and GND, and add a 10k resistor between A01 and 3.3V to form a voltage divider, and this allows me to test the ADC performance quickly. The platformio.ini for STM32 Blue Pill using Arduino STM32(Maple) platfrom will looks like this: For someone new to STM32 Blue Pill, it is easy to assumed that you can program the STM32 Blue Pill via USB, just like Arduino (or ESP32). If you use PlatformIO to create a new project, it will generate the platformio.ini configuration that looks like this for STM32 Blue Pill using the STM32duino(ST STM32) core: If for some reason you would like to use Roger Clark’s Arduino STM32 implementation, you will need to add the board_build.core = maple into the platformio.ini to manually override the default Arduino Core platform. I want to program my bluepill board using a STLink-V2 debug probe (clone). A lot more expensive of course. Sure I did, but I added a couple tests in my first program. Here's a high level comparison of Xtensa vs arm: https://nullcon.net/website/archives/pdf/goa-2018/carel-nullcon-arm-vs-xtensa-exploitation-%28final%29.pdf, If you want to get into the details of specs and performance, find the datasheet for the processor on the STM32 board you ordered and compare it to this: https://www.espressif.com/sites/default/files/documentation/esp32_datasheet_en.pdf. each module can both send & receive data.It works within the frequency of 2.4GHz.This frequency falls under the ISM band and is legal to use in most countries for engineering projects. Cortex M4 or M7? Interesting to see as noted @Hamish with the link he posted, STMicro acquiring Atollic IDE that was classified in this review as the most efficient. STM32 line has better price to performance ratio parts, for example: STM32H750 , it runs at 400MHZ, has 1MB bulit in SRAM, it has DSP instructions, a double precision floating point unit. Another design fault is also related to USB, although it only affect data communication via USB port which will not happen unless you have manually installed the USB bootloader. It then setup A0 (PA0) as analog input and set the analog resolution to 12-bit. If you never use PlatformIO for Arduino programming, the following two videos from Robin Reiter on YouTube provides a quick installation guide for setup PlatformIO. According to this article published in Nov 2015 that ST claims “it’s a pure piracy: no agreements of any kind between ST and Giga Device, no license… nothing. Press the Reset button on the board prior uploading so that the board enters serial bootloader mode. Also, probably the most notable difference and the main reason why people use the ESP32 is for its support for 2.4GHz WiFi and BLE. However, for fairly simplistic projects, it’s a bit of an overkill. There are plenty of dsp libraries for the STM32 line. So obviously for STM32 Blue Pill the default bootloader assumed you will interface with STM32 via SWD signaling by default. You can either using Arduino IDE or PlatformIO as your IDE environemnt for writing your STM32 program. It turns out there are some libraries works for both implementations, but some works only for Arduino STM32, and some only works for STM32duino. Why the development board is called Blue Pill is obviously refering to its signature blue PCB board. RM0008 STM32F10xxx Reference Manual, STMicrelectronics Here's a short side by side comparison video for all the popular competitors of the Brand New RaspberryPi Pico Dev Board. They may shut down Giga Devices legally, but illegally the cloned STM32 design can be produced at many places secretly and sold as STM32 original parts even after the GigaDevices closure!”. Learn how your comment data is processed. By the way, the board that I bought from China came with STM32F103C8T8, but I will probably never know whether it is a fake STM32 or a real one after knowing all these information. I have this board STM32F103C8, I can use it fine, but if I restart it the code doesnot start, I need to connect the USB cable to pc and when open a serial termina the code starts. Blue Pill is powered by the powerful 32-bit STM32F103C8T6 ARM processor, clocked at 72MHz. I decided to just keep the ESP32 for other projects and put in an order for STM32. The nRF24L01 is a wireless transceiver module, i.e. This board is connected to the Rx and Tx pin of the STM32 as shown below. In order to test deep sleep, an external library called STM32 Low Power is required, so configure the lib_deps (library dependencies) on platformio.ini so that it will be installed as project-based dependency (one reason I like PlatformIO over Arduino is its dependency management). The clock rate matters too. Did I try the LED blinking sketch? To test it, Click on File -> Examples -> A_STM32_Examples->Digital->Blink. I’m also interested on how STM32 Blue Pill perform at deep sleep mode in term of power consumption. However, the app is probably never properly registered with Apple and not distributed through Apple App Store, so if you double click on the Mac installer application to run the app, it won’t work because the app is under quarantined by MacOS on my Mac running macOS High Sierra. A much more fun reason is that once upon a time there was a similar product with red PCB, to deferentiate it, the development community has name the one with the blue PCB as Blue Pill and the one with the red PCB as Red Pill, referring to the movie The Matrix, where Neo is offered the choice between a red pill and a blue pill by Morpheus. The F303CC runs at 72MHz, a bit slower than the Teensy 3.2, but still half the speed of the ESP32. STM32 has much better compiler support, so you probably can utilize the DSP instructions strait from C code, for the ESP32 you have to write assembly to fully utilize. That’s where the Arduino Core for STM32 fit in, but this is also one of the first thing that confused me…. while(!Serial){delay(1);}. One thing to notice is that even the STM32F103C8T6 price at LCSC is significantly lower than what you find from DigiKey, Mouser, Arrow or any other international component e-commerce platform. Other than the LED that connected to the PC13 pin, there is a power indication LED that is constantly on even during the deep sleep. Blue Pill proof of concept. In the movie, Neo chooses the red pill. STM32 “Blue Pill” is a popular, and cheap (>$2) development board based on STMicro STM32F103C8T6 Arm Cortex-M3 microcontroller and programmable with the Arduino IDE. It's cheap though, STM32 on the other hand has documentation. It is less noisy and much accurated (on linearity) than ESP32’s ADC. Wire your STM32 (e.g. STM32 ADC provides 12-bit resolution over 3.3v (i.e. This is very confusing and frustrating for someone is new to STM32 development! Later, Dave Schwartz and myself designed a … The STM32 then go into deep sleep for 10 seconds so that I can measure the current consumption with my multimeter. STM32 line has better price to performance ratio parts, for example: STM32H750, it runs at 400MHZ, has 1MB bulit in SRAM, it has DSP instructions, a double precision floating point unit. I powered my STM32 Blue Pill with 5v via the USB/TTL programmer. If you bought your STM32 Blue Pill online, take a closer look at the STM32 chip. I know that BluePill has hardware for a quadrature encoder – I just don’t know how to use it. Yes, \"almost 2018\", update. But I am guessing a Cortex M7 with CMSIS DSP functions is going to be lot faster than an ESP32 in every way. The red pill represents an uncertain future, and the blue pill represents a simulated reality of the Matrix with confined conform living. ST offers its own IDE for STM32 called STM32CubeMX, judge from the introduction video from ST and some of the youtube videos that using the STM32CubeMX, it seems to be a very powerful IDE but a little complicated to setup and configure various board settings. Raspberry pi pico vs esp32. One of the differences between Maple Mini and Blue Pill is that the +5V pins on Blue Pill is directly connected to the +5V pin of the USB connector. There are basically the same thing. In conclusion, I used both of them and since they are both quite affordable (both under 7$,if you take the blue pill for the ST32) I strongly suggest to take them both;P but if you just want to have one microcontroller around then I suggest you to take the ESP32 and have fun with IoT projects. This highly depends on what STM32 you ordered... STM32 ranges from Cortex M0 to Cortex M7. AN2834 Application Note: How to get the best ADC accuracy in STM32 microcontrollers, STMicrelectronics Youtube Video » raspberry pi pico vs esp32 . For Arm-based embedded system development, ARM created an alternative debug interface called SWD (Serial Wire Debug) that only uses two signals (SWDCLK and SWDIO). Programming the “Blue Pill” You are now ready to program the “Blue Pill” board with the Arduino IDE. At the end of the article, the author said: “I think the lawyers would not help in this case. It works until later on when I try to test the STM32 deep sleep that I need to install a library, I then realized the library doesn’t work (with error during compilation), it took me a very long time to debug and eventually I discover that the library work perfectly with STM32duino. The analog input value of the thermistor is then processed and converted to Celsius, you can read about my previous blog regarding the thermistor and the progrom. Since STM32 is an Arm-based microcontroller, therefore you can develop STM32 using Arm’s official development platforms such as Keil MDK5 (Windows-base only) and MBed if you are serious in Arm programming. I forgot to mention that the ESP32 is dual-core Shootout: Raspberry Pi Pico vs ESP32(-S2) and STM32 Blackpill. The STM32 Blue Pill consumed about 26.6mA on my measurement when the blinking LED (one that connected to the PC13) is ON and 24.2mA when the blinking LED is OFF. ST legal people are in charge of this problem”. For someone new to STM32 Blue Pill, it is easy to assumed that you can program the STM32 Blue Pill via USB, just like Arduino (or ESP32). ST has long held the lead position of having the best documentation for their microcontrollers and best designs. New comments cannot be posted and votes cannot be cast, Press J to jump to the feed. Raspberry pi Pico compare with Arduino uno, ESP8266, and ESP32. PlatformIO supports both Roger Clark’s Arduino STM32 and ST’s STM32duino, PlatformIO refer to those implementation as “platforms”, and naming convention for PlatformIO to install the platform is neither Arduino STM32 nor STM32duino (this is another confusing part for new beginner), it actually is ‘ST STM32‘ (On Arduino IDE, it is called ‘STM32 Cores‘ for STM32duino). You don’t have to have an SWD programmer like ST-Link to program the STM32 Blue Pill, you can do so using UART interface, just like programming the Arduino Pro Mini (which does not have a USB port). That makes sense. ... ports/esp32/ -- a version of MicroPython that runs on Espressif's ESP32 SoC. ST provides its own debugger/programmer called ST-LINK/V2, the one that ST called ST-link/V2 looks quite different from those that you can find in Amazon and eBay. The delay(100) prior STM32 going into deep sleep is necessary for serial monitor to finish the printing before STM32 shutdown. ports/nrf/ -- a version of MicroPython that runs on Nordic's nRF51 and nRF52 MCUs. However, this is not the case for STM32 Blue Pill, the build-in USB port is more or less for providing power only because by default it does not come with the boatloader for programming via USB port. However I doubt if any of these processes is quicker than just picking up a cheap Serial->USB or JTAG/SWD->USB bridge from your local reseller. If you are using Arduino for programming STM32 Blue Pill, make sure all Board settings from “Tools” drop-down menu configured as shown below: It took me quite a few days to put all the pieces of the puzzle together and I’m finally ready to write my first STM32 program. Unlike a real wall clock, the Real Time Clock doesn’t tell you the time of the day. LowPower.begin() prepare the STM32 for deep sleep. Despite the hiccup that I faced to set it up, the STM32 Blue Pill is an amazing microcontroller for a price of US$2. Blue Pill) to the ESP32 as follows: ESP32 STM32; GPIO4(TX) PA10(RX) GPIO5(RX) PA9(TX) GPIO19: RESET: GND: GND: Generate a .bin file for the STM32 MCU code you want to flash. Hi, STM32CubeProgrammer for Linux and Mac essentially is a Java application. To get the STM32duino, you have to get it from ST’s github https://github.com/stm32duino, instead of many sites told you to get it from STM32duino.com. ST for short) offers a wide range of general-purpose microcontrollers for both 8-bit MCU (STM8) and 32-bit Arm Cortex-M based microcontrollers (STM32). It got me wondering what the differences between the hardware are. – sprintf and floating point. Your email address will not be published. It has the required memory and can have a RTC added. Berikut ulasannya. There are other sellers, but their devboards are not pin compatible with the F103C8 and they are running $11. STMicroelectronics (a.k.a. By default, PlatfromIO uses official STM32Duino core, and the platformio.ini file set the platform as platform = ststm32, this means STM32duino. To do this we need to use a Serial FTDI board. Pada bagian ini akan dibahas mengenai perbandingan antara board mikrokontroller Arduino, STM32 Blue Pill, ESP32, dan LPC1769. Perbandingan ini berdasarkan dari pengalaman penulis saat menggunakan keempat mikrokontroller tersebut selama praktikum dan perkuliahan Sistem Embedded. It is unclean whether ST purposely price its products lower within China in order to compete with GigaDevice or it paid lower licensing rate to ARM for China market, or as predicted by the article, that those marked as STM32F103C8T6 in China are not even from ST?! Obviously, the sophisticated STM32 equipment costs more than an Arduino and is thus more versatile. Apparently some of the early boards have a wrong value of R10 resistor (on the back of the Blue Pill board) on the USB D+ pin. There are only two main issues. So depend on your computer, you might need to install Java engine if your computer doesn’t have it yet or running an older version that is not compatible with STM32CubeProgrammer. On a recent project, I was quite disappointed with ESP32’s ADC performanace. STM32 seems to offer a workable solution for ADC applications that I don’t need an external ADC as compare to Arduino (because it is not accurate enough) and ESP32 (because its non-linear ADC performance). The Vcc pin of the FTDI board is connected to the STM32 5V pin of power the board. It offers a well balance between Arduino and ESP32 on speed, memory and power consumption. by snm, December 12th, 2017. These modules are a great alternative to Arduino NANO or Pro Micro, and a lot more powerful. At a very general level, they are both fruits, in this case they are both microcontrollers. But in our verion of “reality”, blue pill seems to be winning the game, as I can only glance at how the STM32 Red Pill looks like from an achieve web page at achieve.org, it seems it is totally disappeared from the market. Perbandingan Mikrokontroller Arduino, STM32 Blue Pill, ESP32, dan LPC1769 January 2, 2019 Perbandingan Prosessor yang digunakan pada Praktikum Perancangan Sistem Embedded December 29, 2018 Spectrum Analyzer dengan Arduino UNO December 29, 2018 Maybe try out a simple FFT with both and do a simple benchmark? but when i used blue pill to communicate with esp8266-12E, it is not working through Serial1, Serial2, Serial3 (i have checked one by one). Just a pleasure to work with almost all of the time. What STM32 is it? This site uses Akismet to reduce spam. On a recent trip there, I bought a STM32-based development board that is commonly referred as STM32 Blue Pill for CNY15 (slightly over than USD2). Apparently there are two Arduino Core implementations for STM32, one is called Arduino STM32 by Roger Clark, and there is another one called STM32Duino that is hosted at ST’s official github. These "Blue Pill" STM32 modules are equipped with the original STM32 controller, for those who want to program them rather with the ST tool chain than with Arduino IDE (Arduino Bootloader can be installed with the included ST Link adapter, of course). The Generic STM32F103 Pinout Diagram, Rasmus Friis Kjeldsen ... Super Blue Pill — Like STM32 Blue Pill, But Better! No one know who design the STM32 Blue Pill, but it is commonly acknowleged that it is based on Maple Mini from Leaflabs. That will be for a separate tutorial as we will be using STM32's own development platform, the STM32Cube. Blue Pill Vs Black Pill: Transitioning From STM32F103 To STM32F411. The ESP32 has one obvious advantage of having two cores (240 MHz clk). If you are planning to use an Arduino for an early prototype of your product, then you should also consider the more powerful STM32duino development board. The labling is also similar to the Arduino boards. The board that I bought has the 1.5kΩ resistor. The stm32duino.com – a community forum has been re-activated after being down for a few months. ... 30 thoughts on “ STM32 Blue Pill Turned GPG Security Token ” ... Hands-On: The RISC-V ESP32-C3 Will Be Your New ESP8266 60 Comments Required fields are marked *. I have a couple of those USB to TTL converter as a programmer with a CH340 chip (those with FTDI chip doesn’t work on my old MacBook Pro), but if you don’t have one, here is a link that provide a list of similar products. STM32 Blue Pill Schematic Diagram (with a wrong R10 value of 4.7k), STM32-base. In either case, you will need to install STM32CubeProgrammer from ST. STM32CubeProgrammer provides the communication between your IDE environment with STM32 board. To program the STM32 Blue Pill board directly through USB port we need to first flash the Maple boot loader into the MCU. I just found your post because I connected the bluepill to USB and ST-Link at the same time and now it doesn’t work anymore :'(. Raspberry Pi Pico Vs Esp32. This caused broken links on many websites about STM32! The complete pin-outs of the STM32 Blue pill board is shown below. This is the first frustration that I encountered. Press question mark to learn the rest of the keyboard shortcuts, https://nullcon.net/website/archives/pdf/goa-2018/carel-nullcon-arm-vs-xtensa-exploitation-%28final%29.pdf, https://www.espressif.com/sites/default/files/documentation/esp32_datasheet_en.pdf. Submitted by Khalid on Mon, 2018/09/10 - 17:30. When STM32 go into deep sleep, I get a measurement of 2.5mA on my multimeter reading, if I minus the power-indicator LED consumption, it means the STM32 consumed about 0.1mA or less during deep sleep which is good enough for most of my projects. Definitely STM32, ESP is not well documented and there is not enough support. p.s. the STM32 range is much better documented than ESP32. ESP32 has the disadvantage of being a secret shitcore from Tensilica shrouded in mystery. So I ordered STM32 and received ESP32 (package was labeled STM32!) Whenever I was in Hong Kong, I often cross the board to Shenzhen (to Hua Qian Bei Road to be exact) to search for interesting hardware. Update 2 Arp 2020: On my recent online purchase from diymore.cc, despite the product image on diymore.cc website clear show it’s using STM32F103C8T6, the STM32 Blue Pill that I received comes with a chip marked as CKS32F103C8T6. New to esp32 and wonder how to setup the dev environment. Until very recently (probably till March/May 2019 based on the information that I found from achieve.org), this site has been taken down. And i have used this module before with arduino uno and mega and get wanted results. Do you know a way or a page to do so? PlatformIO provide a very comprehensive documentation on how to use PlatformIO for programming STM32 with Arduino Core. Next time you buy a STM32 Blue Pill (or any STM32 products), take a closer look…. Now for stm32, I can compile by, arm-none-eabi-gcc -Wall -Wextra -g3 -O0 -MD -mcpu=cortex-m3 -mthumb -DSTM32F1 -Ilibopencm3/include -c -o pill_blink.o pill_blink.c A direct comparison of the Atmega and STM32 would not make much sense. ELI5 (or just a noob) why I would want to use the STM32 over the ESP32 for DSP programming. Have you any informations abaout encoder with the bluepill?

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