I'm trying a new experience with online BOM that could facilitate the production and purchase, otherwise the BOM is also available in the zip file, though to facilitate the DIY production, these boards are based on modules.

• STM8S_RF_Dongle_v2 findchip BOM
  • Here you need 4x res of 1K in 1206 format
  • The STM8S103F3P6 is the small blue pill module (very easy to find online, but not available on raw electronics parts suppliers)
  • The nRF24L01+, same is the ready module.
• STM8L_RF_Sensors_v2 findchip BOM
  • The BME280 based module is referenced as GY-BMEP
  • The MAX44009 module is referenced as GY-49 (both modules are also very easy to find online and not from raw components suppliers)
  • MRMS211H, STM8L151F3P6 and resistances are raw components.

• The firmware is located in every corresponding directory close to the Rpi SW in the main IoT_Frameworks repo.
• This repo contains a main libs folder in the root that contains the drivers that are shared by all applications.
• It is possible to use free compilers, but I opted for a fully integrated solution including debug capabilities with the IAR for STM8. It is free for non commercial and requires registration but fully worth it.
• You need an ST-Link_v2 which is available online for very cheap.
• I use the ST Visual Develop to configure the option bits, verification and EEPROM programming (that where the nodeds are)
• You need to install any driver for your USB to serial adapter (e.g. CP2102)
• I use putty as a terminal.
• I use Visual Studio Code for firmware as well
  • Note that you can add the include of the IAR compiler to have automatic completion

With the fashion of over the air flashing and all the head ache that comes with (rf boot,...) an alternative solution is a USB power block powered Raspberry pi STM32 flasher, how's that ? Very easy :

• installing the st-tools allow me on windows to run such commands (hang on rpi is down)

  st-flash write .\BUILD\BLUEPILL_F103C8\GCC_ARM\rf_uart_interface.bin 0x08000000

• Luckily, some nice dudes provided this tool for the raspberry pi (linux) as well
• The github repo from texane
• The repo is targeted for advanced users, luckily some other nice dudes provide easy instructions

sudo apt-get update
sudo apt-get install cmake
sudo apt-get install libusb-1.0-0-dev
mkdir ~/proj
cd ~/proj
git clone https://github.com/texane/stlink stlink-repo
cd stlink-repo
make

• I have the whole pi user folder shared with my windows with samba so I just copy paste the bin on the raspberry pi
• do not forget the sudo for the rights to access the usb

sudo st-flash write rf_uart_interface.bin 0x08000000

Last but not least, how to make this fancy with touch screen raspberry pi, without a third hand for the keyboard.

• Flash script

  #!/bin/bash
  echo "Flash starting...."
  sudo ./st-flash write smt32_rfpio_firmware.bin 0x08000000
  echo "Flash complete press return to exit"
  read dummy

 do not forget to make your script executable

• Desktop shortcut

  [Desktop Entry]
  Name=Flash STM32
  Comment=use it to flash the smt32_rfpio_firmware.bin
  Exec=lxterminal -t "Flash STM32 with rfpio" --working-directory=/home/pi/stlink_tex/stlink-repo/build/Release/ -e ./flash.sh
  Type=Application
  Encoding=UTF-8
  Terminal=true
  Categories=None;

I know that the Raspberry pi SW installation is not trivial, there's plenty of google entries for every topic, which I required for all steps I've done. I am also not an advanced Linux user and cannot improvise an install or compilation from source that is not described in another wiki somewhere, so here is simply the install list I performed :

• boost (described further in the main github repo)
• POCO : Network components for c++ HTTP servers, websockets and others
• SAMBA : for a convenient access to the RPi and work on windows environment
• MQTT-Mosquitto
• OpenHAB2

• The design files are available in the github STM8_IoI_Boards, and also attached as zip to this project files.
• These files can be edited and produced with Eagle, the ready to order gerbers cam are also included in the zip file.
• The STM8 Fixed Node v2 is easy as it uses the STM8S breadboard.
• The STM8L Wireless Node (Mobile_v2) is hard as it uses the STM8L151F3 in TSSOP20 format.
  • To solder the TSSOP20 manually I use a flat edge iron.
  • I bought a lot of very cheap TSSOP20 components and board adapters to practice with.
  • The usage of Flux is a must.
  • Very important to glue the component first and wait that it holds.
• I ordered the PCBs from an online PCB supplier, which costs about $15 for 10.
• It is important that you combine multiple boards together to drop costs down, so don't hesitate to share the production with friends or community.