Control Webasto Parkin Heater with Meitrack GPS Here is a schematic diagram of connecting Meitrack GPS to control Webasto parking heater. You can turn it on/off with the following SMS: ZSH 0000,C01,20,22221 1 0000,C01,20,22221 ZSH 0000,C01,20,22220 1 0000,C01,20,22220 Or use some web app…