The title „IoT Projects for Makers“ was published at the end of June, and the first update follows.
Via Aliexpress, I found a Modbus sensor (and many comparable devices) for temperature and humidity measurement at low prices. Modbus RTU via RS-485 is still a common interface in industrial applications. This sensor uses a Sensirion SHTC3 sensor, which allows precise results.
This industrial sensor for temperature and humidity with Modbus RTU via RS-485 has been added to the sensors considered so far.
WiFi is utilized to connect to a router that provides Internet access.
The message containing the measuring results is sent to the Pushover server, which forwards it to the corresponding end devices, an Android mobile phone here.
In the application here, a message with measured values is sent every 15 minutes. This is first an arbitrary assumption and can also be state-based.
2023-07-19/CK
ck blog 