Please refer to here: https://github.com/Xinyuan-LilyGO/LilyGo-LoRa-Series/blob/master/examples/RadioLibExamples/SX1276/SX1276_Transmit_Interrupt/SX1276_Transmit_Interrupt.ino

@ak Around 800uA

This may not be possible on the existing basis, and part of the current consumption should come from the power consumption itself

I have an example using MicroPython before, but using ESP32, they are all driven by the built-in SPI module of MicroPython, you should modify the pins slightly and it should work fine

https://github.com/lewisxhe/mPython_ST7789

Please change the network mode to automatic to see if you can connect to the network correctly

modem.setNetworkMode(2);

Please refer to here MqttClient

Have you set SMS_TARGET correctly?
Set SMS_TARGET to the object you need to send, and your SIM card needs to support sending messages

T-DISPLAY uses ESP32
T-DISPLAY-S2 uses ESP32-S2
As shown in the figure below, in addition to the already used IO ports, you can freely allocate available IO ports

Just move the green selected original to the red pad

I don't understand what is your problem? VBUS input source is MicroUSB, D1 and Q1 are battery input and VBUS selection circuit