Similar but his at least runs for a while:.Looking around online, I found others are having this problem as well: Trying to set up the I2C sensor to take magnetic field data, but debugging is showing that Wire.endTransmission() hangs the sketch (debug code below). Serial.I2C hardware: MAG3110 magnetometer ( Triple Axis Magnetometer Breakout - MAG3110 - SEN-10619 - SparkFun Electronics) Serial.println("NACK on transmit of address") When the return value is “3”, the received NACK indicates a data transmission error. If the slave device successfully received the previous byte, it sends an ACK. A value of “4” means another error. The value “5” is received in case of timeout. The value “ 2 ” is the received NACK when the slave address is transmitted. An acknowledgment bit is sent after every sent byte. This AKC/NACK bit is used by the slave device to indicate whether it has successfully received the previous byte. After sending the slave address, when the master sends the address of the slave it wants to communicate with, a slave that recognizes its address sends an ACK. This tells the master that the slave you want to reach is actually on the bus. If no slave device recognizes the address, the result is NACK. In this case, the master interrupts communication because there is no one to talk to.
If the return value is “ 0 ”, it means the transfer was successful. “ 1 ” indicates that the data is too long to fit in the transfer buffer. The return value of the Wire.endTransmission() function can be useful, for example, when debugging. these values can be: If the parameter is false , Wire.endTransmission() sends a restart message after the transmission, so the I2C bus remains busy. This allows the current master device to send additional messages and prevents another master from taking over the I2C bus.
If the parameter is true , Wire.endTransmission() sends a stop message after the transmission, releasing the I2C bus.
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