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![RaymingTech Avatar](https://lunarcrush.com/gi/w:24/cr:twitter::817577614806159360.png) RayMing PCB [@RaymingTech](/creator/twitter/RaymingTech) on x 1768 followers
Created: 2025-07-14 09:32:00 UTC

AQI monitor datalogger system

the device monitors ambient AQI and send data to gateway using RS232/RS485 protocol.

the systems uses 
X. #STM32 from #STMicroelectronics
X. SGP40 from #Sensirion
X. MCP7380 from #Microchip Technology Inc.
X TLV1117/AMS1117 from Texas Instruments & ams OSRAM
X. Cell type lithium #battery for power

![](https://pbs.twimg.com/media/GvZw65kXoAAY2Hf.jpg)

XXX engagements

![Engagements Line Chart](https://lunarcrush.com/gi/w:600/p:tweet::1944691339150430422/c:line.svg)

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[Post Link](https://x.com/RaymingTech/status/1944691339150430422)