/* There was a help from these two pages:
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https://forum.arduino.cc/t/connect-nrf24l01-to-esp32/678710/4
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https://electropeak.com/learn/wireless-communication-w-arduino-and-nrf24l01/
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*/
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#include <RF24_config.h>
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#include <nRF24L01.h>
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#include <RF24.h>
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#include <printf.h>
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#include<WiFi.h>
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#define IN_TRIGGER 17
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#define OUT_TRIGGER 16
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//RF24 radio(2, 4); // CE, CSN // This is for alternative wiring.
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RF24 radio(22, 21); // CE, CSN
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const byte address[6] = {'R','E','C','V', '1'}; // Do not change this address.
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char dataToSend[4] = "TRG";
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void IRAM_ATTR isr() {
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digitalWrite(OUT_TRIGGER, LOW);
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radio.write( &dataToSend, 4 );
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long time=micros();
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while(micros()-time<5000);
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digitalWrite(OUT_TRIGGER,HIGH);
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}
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void setup() {
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// put your setup code here, to run once:
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WiFi.mode(WIFI_OFF);
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btStop();
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radio.begin();
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radio.openWritingPipe(address);
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radio.setPALevel(RF24_PA_MAX);
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radio.setDataRate( RF24_1MBPS );
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radio.setRetries(1,0); // delay, count
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pinMode(OUT_TRIGGER, OUTPUT);
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digitalWrite(OUT_TRIGGER,HIGH);
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attachInterrupt(digitalPinToInterrupt(IN_TRIGGER), isr, FALLING);
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Serial.begin(115200);
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}
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void loop() {
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// put your main code here, to run repeatedly:
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//To send the code every 5--6 ms, uncomment this code
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/*
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radio.write( &dataToSend, 4 );
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long time=micros();
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while(micros()-time<5000);
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*/
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}
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