SEN0440 (MiCS-5524) I2C interface
Sapper 2025-07-09 17:41:07 729 Views2 Replies Hi,
I intend to use SEN0440 (MiCS-5524) in my project.
On Product Wiki Page, it says that it has i2c interface, but the product picture does not show i2c, but only shows Analog-Value pin and Enable pin.
Q1: Does SEN0440 has i2c interface ?
Q2: I need to get PPM/PPB readings of all detected gasses (CO, CH4, C2H5OH, C3H8, C4H10, H2, H2S and NH3) individually. Is it possible or not ?
Q3: How many gasses can it measure individually ? In Product Wiki introduction section, it mentions 8 gasses, in Specification section it mentions only 5 gasses, in Sample Code it mentions 6 gasses. I am confused.
Kind Regards,
Hassan
1. The SEN0440 device with the MICS-5524 chip does not have any digital output. The only output is an analog voltage on pin A0, just like SEN0441 with the MICS-2714 chip.
2. The metal oxide sensors (all the MEMS sensors in this series) can only detect oxidizing or reducing environments. They do not exhibit specificity – i.e., they cannot pick out which gas it is, only that something is consuming oxygen or providing oxygen.
3. The 5524 chip will happily respond to anything that reacts with oxygen, including several chemicals not named in the sample code or the data sheet. If you are wanting to detect a specific gas, you will have to do your own testing. Warning: these are not calibrated devices and can only give you an indication of a presence and maybe a rough idea of concentration. For your applications, that may be good enough, but be aware.
SWGlassPit Yes. Not clear where the I2C pins are. I hope dfrobot will clarify.
ahsrab.rifat 
