Devices equipped with SIM cards provided by Contrive communicate with the server and with each other within a VPN.
Each of these devices is assigned an IP address to which any other device can send messages and commands directly
with the AT#UDP command, specifying the destination port 2020.
The text of the last message received is contained in parameter S17.
The commands are executed only if the password of the device to be controlled is present at the beginning of the message.
When setting variables remotely, it is possible to insert single or concatenated tags (spaces are not allowed).
In the same message there can be more commands and also free text.
AT#UDP=100.125.251.107,2020,"0000 AT#LOG='UDP from $D01' out1=1,3 mem1=1 varY=8 hello"
If the device at address 100.125.251.107 is reachable, it will immediately receive the message: