25 lines
750 B
C++
25 lines
750 B
C++
#include <Arduino.h>
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#define EXTERNAL_RX_PIN 16 // GPIO pin for the external device's TX
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#define EXTERNAL_TX_PIN 17 // GPIO pin for the external device's RX
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#define BAUD_RATE 115200
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void setup() {
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// Initialize communication with the computer (via USB-to-UART chip)
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Serial.begin(BAUD_RATE);
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// Initialize communication with the external device (on designated GPIO pins)
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Serial2.begin(BAUD_RATE, SERIAL_8N1, EXTERNAL_RX_PIN, EXTERNAL_TX_PIN);
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}
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void loop() {
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// Read from computer (Serial) and send to external device (Serial2)
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if (Serial.available()) {
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Serial2.write(Serial.read());
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}
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// Read from external device (Serial2) and send to computer (Serial)
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if (Serial2.available()) {
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Serial.write(Serial2.read());
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}
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} |