12-01-2025, 06:59 AM
Hello,
my KC868-A2 is LTE-only, it is never connected to LAN or Wi-Fi.
1. The firmware provides no LTE data support
There is no LTE option in the UI — only “GPRS”, and there are no APN or PDP settings.
Because of this, the SIM7600 cannot use mobile data for Tuya or MQTT.
2. Tuya does not work over mobile data
When GPRS is enabled, Tuya always stays disconnected, even with Ethernet unplugged.
3. MQTT also does not work over mobile data
MQTT connects only when the board is on LAN/Wi-Fi.
With LTE/GPRS only, MQTT never connects.
4. LTE modem itself works correctly
When the SIM7600 is connected directly to a PC, LTE works perfectly (APN OK, NETOPEN OK, mobile IP assigned).
So the modem and SIM card are fine.
Question
Does the KC868-A2 support Tuya or MQTT over LTE data at all? If yes, which firmware version enables this?
Board Model KC868_A2 Software
Version v2.2.17
Build Date Nov 16 2025 14:14:44
Serial Number 8813BFB4F384
my KC868-A2 is LTE-only, it is never connected to LAN or Wi-Fi.
1. The firmware provides no LTE data support
There is no LTE option in the UI — only “GPRS”, and there are no APN or PDP settings.
Because of this, the SIM7600 cannot use mobile data for Tuya or MQTT.
2. Tuya does not work over mobile data
When GPRS is enabled, Tuya always stays disconnected, even with Ethernet unplugged.
3. MQTT also does not work over mobile data
MQTT connects only when the board is on LAN/Wi-Fi.
With LTE/GPRS only, MQTT never connects.
4. LTE modem itself works correctly
When the SIM7600 is connected directly to a PC, LTE works perfectly (APN OK, NETOPEN OK, mobile IP assigned).
So the modem and SIM card are fine.
Question
Does the KC868-A2 support Tuya or MQTT over LTE data at all? If yes, which firmware version enables this?
Board Model KC868_A2 Software
Version v2.2.17
Build Date Nov 16 2025 14:14:44
Serial Number 8813BFB4F384