Bluetooth serial communication between RP2040 using HC-04 Bluetooth Module, in BLE/SPP mode.
Last post show a simple example of Serial communication between two RP2040 (Arduino Framework). With HC-04 Dual Mode Bluetooth Module (SPP/BLE), it's easy to implement bluetooth serial communication without change in
code.
For the Arduino code Serial_9600N81_SH1107.ino and SerialPassthrough_9600N81.ino, refer to last post.
Setup
Test Host (ttyACM0) Test Host (ttyACM1)
| |
+-----------+ +-------+ +-------+ +-----------+
|Slave | |HC-04 | |HC-04 | |Master |
| TX|---|RX | Bluetooth | RX|---|TX |
| RX|---|TX |<~~~SPP/BLE~~~>| TX|---|RX |
| 3V3|---|VCC | | VCC|---|3V3 |
| GND|---|GND | | GND|---|GND |
| | +-------+ +-------+ | |
+-----------+ +-----------+
+-----------+
|SH1107 OLED|
| |
+-----------+
WeAct RP2040 running Raspberry Pi Pico running
Serial_9600N81_SH1107.ino SerialPassthrough_9600N81.ino
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