I tried BLE (Bluetooth Low Energy) communication between M5StickC and Raspberry Pi4
I used the M5StickC and BME280 sensor module to measure temperature, humidity, and air pressure, and advertise the measurement results via BLE.
Program to display temperature and humidity on the Raspberry Pi
An article on connecting a temperature, humidity, and barometric pressure sensor to a Raspberry Pi to measure temperature, humidity, and barometric pressure.
Installed Amazon FreeRTOS on ESP32 DevKitC and tried the sample program.
FreeRTOS (Real Time Operating System) was acquired by Amazon in 2017 and is being developed as “Amazon FreeRTOS”.
A lightweight and simple Real Time OS
I created a simple program (C++) in Arduino IDE and tried to run it on M5StickC.
I got an M5StickC.
M5StickC is a stick-type product from M5Stack Company, which is based on ESP32-PICO, the same architecture as ESP32.
I added a button to the Raspberry Pi to shut it down with a long press.
Since the Raspberry Pi is a Linux OS, it cannot be turned off suddenly.Need to shut down the OS with the shutdown command.
Button to recover Raspberry Pi from stopped state
In order to boot the OS again after shutting down on the Raspberry Pi, it is necessary to turn off the power supply from the USB and then turn it back on.
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