Dear Sirs,
I have a SIM card with a static public address, working over our VPN. The device is reporting to the backend server correctly. I would like to send a command to the device using UDP. The device seems to be configured correctly (I set a GTSRI working mode to 6 and enabled heartbeating). So far, I've been trying to send a simple packet using nodeJS dgram library (message "AT+GTOUT=gv300,0,,,,,,,,,,,,,,,,FFFF$" to the device IP address, using primary server port 491xx). Sadly, with no luck. There is no sign from the device. I don't even know if device has received anything. Any ideas? Thank you in advance for you help.
Dear Sirs,
I have a SIM card with a static public address, working over our VPN. The device is reporting to the backend server correctly. I would like to send a command to the device using UDP. The device seems to be configured correctly (I set a GTSRI working mode to 6 and enabled heartbeating). So far, I've been trying to send a simple packet using nodeJS dgram library (message "AT+GTOUT=gv300,0,,,,,,,,,,,,,,,,FFFF$" to the device IP address, using primary server port 491xx). Sadly, with no luck. There is no sign from the device. I don't even know if device has received anything. Any ideas? Thank you in advance for you help.