37 lines
1.1 KiB
Arduino
37 lines
1.1 KiB
Arduino
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// Bidirectional ESP32 ↔ ESP32 serial passthrough.
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//
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// Each ESP32's USB Serial talks to the host Python; Serial2 (UART2 on
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// GPIO16=RX / GPIO17=TX) talks to the OTHER ESP32 via the wire that
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// the Velxio Interconnect routes through the WebSocket bridge.
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//
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// Usage in the dual-ESP32 integration test:
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// - Host writes "PING-A" to ESP32-A's USB Serial
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// - ESP32-A forwards it to Serial2 (TX on GPIO17)
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// - The frontend Interconnect bridges A.GPIO17 → B.GPIO16 over WS
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// - ESP32-B reads it from Serial2 (RX on GPIO16)
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// - ESP32-B prints the received line back on USB Serial
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// - Host observes "PING-A" on ESP32-B's USB Serial output
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//
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// Compile (one-shot):
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// arduino-cli compile --fqbn esp32:esp32:esp32 \
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// --output-dir test/multi_board_esp32/out \
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// test/multi_board_esp32/sketches/serial_passthrough
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void setup() {
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Serial.begin(115200);
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Serial2.begin(9600, SERIAL_8N1, 16, 17);
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delay(100);
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Serial.println("READY");
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}
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void loop() {
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if (Serial.available()) {
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int c = Serial.read();
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Serial2.write(c);
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}
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if (Serial2.available()) {
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int c = Serial2.read();
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Serial.write(c);
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}
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}
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