[i=s]This post was last edited by anni_zzg on 2022-5-22 21:55[/i]1. Hardware circuit connectionThe environmental sensor I purchased directly from Taobao is the SGP30 module, which provides the followi...
The upcoming Raspberry Pi Pico W brings WiFi + BLE capabilities to the Pico platform while being fully pin-compatible with the Raspberry Pi Pico.Infineon CYW4343 Single Band (2.4 GHz) WiFi with WPA3 a...
The figure below is the voltage isolation circuit of the linear optocoupler HCNR201. R1 and R2 in the figure are feedback resistors. If the resistance values are equal, the voltage changes on both sid...
MQTT is a publish and subscribe messaging protocol based on TCP/IP . It is lightweight, simple, open and easy to implement. It is actually a message broker. The device publishes a topic and subscribes...