Temperature Monitor reads temperatures from DS18B20 sensors in grain bins. It consists of a server and multiple clients (controlboxes). The server is installed on a PC on the LAN. Each controlbox has a Wemos D1 Mini to send data over wifi to the server. It is designed to only allow one controlbox to send at a time to improve reliability of receiving the data. Another way to improve reliability is to use only short strings of sensors, one controlbox for every grain bin. The controlboxes are powered by 24V DC or solar.
On startup if a network connection can't be made a web page is started at 192.168.4.1 . Here the network name, password, unique controlbox ID (0-255) and sleep interval (0-1439 minutes) can be set. The sketch can be updated with Over-The-Air wireless update.
Hookup Schematic:
TMarduino can use a DS2482 1-Wire Master. It is a device to connect to 1-Wire networks for improved performance. A DS2482 breakout is available at https://www.artekit.eu/products/breakout-boards/io/ak-ds2482s-100/