Open baldvinhansson opened 2 months ago
There are still differences between SIM7070 and SIM7000 TCP commands. Please refer to the application manual for data transmission test. https://github.com/Xinyuan-LilyGO/LilyGO-T-SIM7000G/blob/master/docs/SIM7070/SIM7070_SIM7080_SIM7090%20Series_TCPUDP(S)_Application%20Note_V1.03.pdf
Dear all.
I have code connecting to the network using LTE-M. I program the ESP32 using Arduino IDE.
Defining my parameters for connecting the modem I use
Then setting up the network I use
Using TinyGSM with RX buffer of 1024 bytes
#define TINY_GSM_RX_BUFFER 1024 // Set RX buffer to 1Kb
Then connecting to a TCP server usingTinyGsmClient _tcpClient(modem, 0);
Then it will send data packets of various sizes, 20-100 bytes each time and receive response of 2-80 bytes each time.
The problem is that the SIM7000G works flawlessly. It can connect and communicate for days, no problem, ever. The SIM7070G however is unable to communicate without dropping data for any more than (randomly) 3-6 interactions/transactions with the server before data coming from the server to the SIM7070G is lost somewhere in transit.
It is a bit random exactly how many transactions it can do before stopping, but never more than a few.
I have looked through datasheets, schematics (though I'm still not able to find one for the T-SIM7070G) and libraries and I am unable to pinpoint a reasonable explanation as to why the SIM7070G would behave like this. Any hints or help is greatly appreciated.