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STM32 RF Node - One HW Many appications
This STM32 RF Node is the main IoT hero of the #Home Smart Mesh project.
- Application Firmware on : IoT_Frameworks
- rf_bridge : Mesh repeater Node with sensors (BME280 + APDS9960)
- rf_uart_interface : RF mesh to serial, to be used with the Raspberry pi c++ app.
- host_controller_interface : Open API to control and diagnose the RF mesh with the Raspberry pi Python commands
- action : Fun and game application, RF distributed state machine managing group speach sessions.
The PCBs design files are shared as open source, free to use without any restriction at github
IoT Boards details
STM32 RF sensors Node Concept
- Always connected to a power supply (no low power worries)
- usage as RF dongle for a Raspberry pi
- RF repeater with color status
- Fixed sensors node (wireless nodes are more efficient but this one is simpler)
- Control node (hopefully when the gesture gets working with the APDS9960)
STM32 RF sensors Node PCB v2
- Added USB connector for power supply, although not connected to the uC USB, this connector is very handy to make a space efficient node housing, similar to a smart USB dongle.
STM32 RF sensors Node v1 Board
- It is possible to connect either a MAX44009 module or an APDS9960 in the middle I²C slot.
- Note v2 has USB connector in addition (not depicted here)
Sensors Node used here as dongle for the Raspberry pi
STM32 RF PIO Concept
- Smart RF controlled PIOs
- extensive PIO number x24 PIO s from which x12 PWM
- power outputs x500 mA 50V compared to uC pio of 25mA 3V
- RF Smart light control
- RF Servo motors control
STM32 RF PIO Schematics
STM32 RF PIO Board
github linksize : 80 mm x 39.37 mm
- It is possible either to connect servo controllers cables or solder an ULN2804A in each of the 3 slots.
RFPIO Board Options
See this RFPIO bloard in action in this project
Existing STM32 Boards
Well this section is out of topic regarding the Bluepill, but given the fact that some boards are using the STM32, I'd like to keep them close here as a reminder for potential use cases and resources sharing: