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April 6, 2019 06:52
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testing data sending using mega to nodemcu
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| //connect the rx<-0/tx->0 on nodemcu rx/tx after mega and nodemcu done uploading this code. | |
| /*-----------------for mega------------------------*/ | |
| void setup() { | |
| Serial.begin(115200); | |
| } | |
| void loop() { | |
| Serial.write("0"); | |
| delay(500); | |
| Serial.write("1"); | |
| delay(500); | |
| } | |
| /*---------------------for nodemcu-------------*/ | |
| #define LED D4 | |
| void setup() { | |
| pinMode(LED, OUTPUT); | |
| digitalWrite(LED, HIGH); | |
| Serial.begin(115200); | |
| Serial.println("Blinking on GPIO pin " + String(LED)); | |
| } | |
| void loop() { | |
| if (Serial.available()) { | |
| char s = Serial.read(); | |
| if (s == '1') { | |
| digitalWrite(LED, HIGH); | |
| Serial.println("on"); | |
| } | |
| if (s == '0') { | |
| digitalWrite(LED, LOW); | |
| Serial.println("off"); | |
| } | |
| } | |
| } |
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