<![CDATA[ENV III M5StickC-Plus SHT3X issues]]>I bought both the M5StickC Plus and ENV III Hat from digikey, but I have not been able to get temperature from SHT3X in Arduino IDE. I keep getting Wire.endTransmission() return value of for NACK. How do I fix/debug this or is this HAT broken?

#include <M5Unified.h>
#include <Wire.h>

void setup() {
  M5.begin();
  Serial.begin(115200);
  Wire.begin();
  
}

void loop() {
  // Start I2C Transmission
  Wire.beginTransmission(0x44);
  
  // Send measurement command
  Wire.write(0x2C);
  Wire.write(0x06);
  
  // Stop I2C transmission
  int result = Wire.endTransmission();
  if (result != 0) {
    Serial.println("Failed");
    Serial.println(result);
  }
  delay(5000);
}
]]>https://community.m5stack.com/topic/3956/env-iii-m5stickc-plus-sht3x-issuesRSS for NodeMon, 11 May 2026 00:30:44 GMTTue, 25 Jan 2022 01:09:12 GMT60<![CDATA[Reply to ENV III M5StickC-Plus SHT3X issues on Sat, 05 Feb 2022 04:20:42 GMT]]>@felmue This fixed the issue! Thanks. I found that this was the issue. It was using Wire.begin() instead of Wire.begin(0,26)

]]>https://community.m5stack.com/post/16531https://community.m5stack.com/post/16531Sat, 05 Feb 2022 04:20:42 GMT<![CDATA[Reply to ENV III M5StickC-Plus SHT3X issues on Tue, 25 Jan 2022 10:31:24 GMT]]>@risingmoon have a look here
https://github.com/m5stack/UNIT_ENV/blob/master/examples/UNIT_ENV_III/UNIT_ENV_III.ino

]]>https://community.m5stack.com/post/16330https://community.m5stack.com/post/16330Tue, 25 Jan 2022 10:31:24 GMT<![CDATA[Reply to ENV III M5StickC-Plus SHT3X issues on Tue, 25 Jan 2022 07:30:12 GMT]]>Hello @risingmoon

try Wire.begin(0,26);. (Note: Information taken from this example).

If that doesn't help maybe try with UIFlow to figure out whether there is a hardware issue.

Thanks
Felix

]]>https://community.m5stack.com/post/16327https://community.m5stack.com/post/16327Tue, 25 Jan 2022 07:30:12 GMT