Last active
August 28, 2019 18:10
-
-
Save paccerdk/912cbc3a6c31a17721bc42c1c01b5fc3 to your computer and use it in GitHub Desktop.
i2c example
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| #include <Arduino.h> | |
| #include <ESP8266WiFi.h> | |
| #include <Wire.h> | |
| #define LED_BUILTIN 2 | |
| void setup() | |
| { | |
| WiFi.mode( WIFI_OFF ); | |
| WiFi.forceSleepBegin(); | |
| Wire.begin(); // join i2c bus (address optional for master) | |
| Wire.setClock(1000000L); | |
| pinMode(LED_BUILTIN, OUTPUT); | |
| } | |
| void loop() | |
| { | |
| //I2C READ (ADC) | |
| digitalWrite(LED_BUILTIN, !digitalRead(LED_BUILTIN) ); | |
| Wire.requestFrom(0x41, 1); // request 6 bytes from slave device #8 | |
| while (Wire.available()) { // slave may send less than requested | |
| uint8_t c = Wire.read(); // receive a byte as character | |
| Serial.print("ADC: "); // print the character | |
| Serial.println(c, HEX); // print the character | |
| } | |
| digitalWrite(LED_BUILTIN, !digitalRead(LED_BUILTIN) ); | |
| delay(10); | |
| //I2C WRITE (PWM) | |
| digitalWrite(LED_BUILTIN, !digitalRead(LED_BUILTIN) ); | |
| Wire.beginTransmission(0x41); // transmit to device #8 | |
| Wire.write(0x13); // register address | |
| Wire.write(0x37); // value | |
| Wire.write(0x42); // value | |
| Wire.endTransmission(); // stop transmitting | |
| digitalWrite(LED_BUILTIN, !digitalRead(LED_BUILTIN) ); | |
| delay(10); | |
| } |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment