#Arduino mega 2560 scl sda pins code how to
#Arduino mega 2560 scl sda pins code serial

With this method, you do not have to initiate the sensor (and lose time) each time you read it.īy the way - Yaser in article #2: you never initiate the Sen2, which might be your actual problem. Serial.println(F('BH1750 Test 2 sensors')) įloat lux1 = lightMeter1.readLightLevel(true) įloat lux2 = lightMeter2.readLightLevel(true) create two instances (one for each sensor) The modified code for 2 sensors is: #include

(Probably the most correct way should be to connect ADDR to Vcc with 2k resistor) One of my sensors has hardwired ADDR to GND and the other sensor has hardwired ADDR to Vcc. I am using Christopher Laws library BH1750.h at GitHub - claws/BH1750: An Arduino library for the digital light sensor breakout boards containing the BH1750FVI IC He instructs to connect the ADDR to pin A3, which to me does not make sense especially if you have 2 sensors. Mohannad in his article #9 refers to but this instructable actually never shows 2 sensors connected to Arduino. It is always a good idea to verify the addresses with I2C scanner. The ADDR pin on the BH1750 (GY-302) is determining if the chip will have the address 0x23 (pin LOW) or 0x5C (pin HIGH) and is actually pulled DOWN !!! according to the schematics. This is an old thread and probably not visited anymore, but in case there is someone wanting to use 2 light sensors at the same time (which I suppose was the issue of this thread) I would like to summarize: Wire.write(0x10) //1 lux resolution 120ms*.Pins A4 and A5 are only SDA and SCL on the ATmega328P-based boards like the Uno. These may not be labeled due the the ICSP header for the ATmega16U2 not leaving any room on the silkscreen there.

#Arduino mega 2560 scl sda pins code serial

Serial.begin(57600) //init Serial baud rate On any relatively new Mega board, there are also dedicated SDA and SCL pins at the end of the female header nearest the USB jack. I run the code above and nothing happen in serial monitor. Sorry for my poor writing skills, but I will try to make it work. Serial.begin(57600) //init Serail band rateīuff = Wire.receive() // receive one byte Int BH1750address = 0x23 //setting i2c address Here the current code I used for 1 sensor (from DFrobot): #include //BH1750 IIC Mode Please give me some input on code reference to changes the address?

#Arduino mega 2560 scl sda pins code how to

I don't understand, how to using it in multiple I2C address/sensor. I'm currently working on BH1750, Light_Sensor_SKU_SEN0097_-DFRobot