42 lines
957 B
C++
42 lines
957 B
C++
/*
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* Heltec Automation ESP32 Serial 1 & 2 example.
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* shows the usage of all 3 hardware uarts
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* work with ESP32's IO MUX
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*
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* to test the software and hardware
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* wire Rx1 to Tx1 and Rx2 to Tx2
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* type text in serial monitor
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* text will walk trough all 2 serials
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* result is echoed to serial (usb)
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*/
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void setup() {
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Serial.begin(115200);
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// Serial1.begin(unsigned long baud, uint32_t config, int8_t rxPin, int8_t txPin, bool invert)
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// Serial2.begin(unsigned long baud, uint32_t config, int8_t rxPin, int8_t txPin, bool invert)
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// The txPin & rxPin can set to any output pin
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Serial1.begin(115200, SERIAL_8N1, 2, 17);
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Serial2.begin(115200, SERIAL_8N1, 22, 23);
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}
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void loop() {
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if(Serial.available()) {
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int ch = Serial.read();
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Serial1.write(ch);
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}
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if(Serial2.available()) {
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int ch = Serial2.read();
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Serial2.write(ch);
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}
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if(Serial2.available()) {
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int ch = Serial2.read();
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Serial.write(ch);
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}
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}
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