@gerald10 said in T-SIM7600G-H R2 questions:

T-SIM7600G-H R2

Hi,

i have the A7608 board, which is quite similar to what you have.

some answers:

1. I do not know, but it would be best to implement some logic where if the battery is below a threshold you keep deep sleeping.
2. That battery also costs a lot of money. You might want to first try a standard 18650, e.g. with 2-3 Ah and see how it goes. Connecting to wifi every 15 minutes and using proper deep sleep gives me a month of battery time without any charge.
3. I think the open circuit voltage of that panel is to high. The board has a CN3065 charging chip (search the datasheet online), and accept up to 6.5V max. Search a "5V" solar panel. Again, I do not know the specifics of your application, but a 1w solar panel can do miracles in many applications.
4. this will depend on the cpu frequency you set for the esp32. At 240MHz, my board sucks 40 mA, but at 40 or 80 MHz you can go down to 10 mA. For battery powered applications you need to learn to deep sleep as much as possible.
5. not sure
6. not sure, but I would suspect live streaming 24/7 requires a different thinking for the power system
7. not sure
8. the antenna can stay in the enclosure you use for the board
9. i use standard abs or polycarbonate enclosure boxes. There are tons of models available for ~10$

Davide

Hi,

I posted an issue on the board's github page (here), but I got no response.

Basically, similar to other boards (see this issue), the T-A7608X board resets the SIMCOM module when the ESP32 wakes after a reset. Looking at the schematic:

this can be avoided by desoldering resistor RV1, as discussed in the issue linked above.

Does anybody from Lilygo knows where this resistor is located, so that I can desolder it?

Thanks.