TroubleshootingArduino

SEN0471 and SEN0472

userHead Sayantan.Hatui 2023-04-24 23:05:57 470 Views1 Replies

I am using four gas sensors (SEN0472, SEN0466, SEN0471, SEN0470), PM sensor (SEN0460), Temperature & Humidity Sensor(SEN027).All the sensors have been integrated with either Arduino uno or Arduino mega(any one at a time) using I2C communication protocol. All the components are being operated with 5V power supply except the main controller board(Arduino mega/Arduino mega). I am trying to print the sensed data on serial monitor as well as on an OLED display in a continuous mode. The repetition of print of each sensor's output is about 15second gap and the gap between print of consecutive two sensors is about 2sec. 

Now, the problems have been listed down.

1. The values given by the NO2(SEN0471), O3(SEN0472) and SO2(SEN0470) seem not to be real values of the ambient air (Experimenting in our lab environment)

2. After about 2-3 hours either NO2 gas sensor(SEN0471) or  O3(SEN0472) or both the sensors are giving abrupt values, though the values corresponding to  each gas is a fixed number.
For reference I am attaching herewith a few snapshots of the serial print 

 

 

2023-04-25 19:13:20

Hello form DFRobot,

 

May I see your code for the sensor please? The reading from O3 do seems odd, is the unit converted correctly? Have you tried our examples codes on:

 https://wiki.dfrobot.com/SKU_SEN0465toSEN0476_Gravity_Gas_Sensor_Calibrated_I2C_UART 

 The maximum range of the O3 sensor should be 10 ppm. Could you also provide us with a photo that shows your wiring scheme? 

Thank you!

Regards,

userHeadPic xingzhao.zhu