NodeMCU (ESP8266) with SX1262 is not working about radiolib HOT 2 CLOSED

I would suggest to start by finding out what -707 error code means. It can be found on this page: https://jgromes.github.io/RadioLib/group__status__codes.html

You will find that this error is indicitave of (among other things) incorrectly selected crystal.

The watchdog reset is only because after error, your code (which you failed to post) enters an infinite loop. The ESP8266 stops petting the watchdog because of that loop, and after a while, the watchdog times out and resets the ESP8266. This has nothing to do with the problem you're having, it's just a consequence of it.

Please help to resolve this issue

That is rather hard to do - you say you have tried the non-standard SPI setups, yet you posted no code. Follow the issue template, I assure you it exists for a reason ...

from radiolib.

Thanks for your help

Now I understand the issue and also issue got resolved. Added the TCXO Parameter in code as below

float lora_sx1262_freq = 878;
float lora_sx1262_bw = 125;
uint8_t lora_sx1262_sf = 7;
uint8_t lora_sx1262_cr = 5;
uint8_t lora_sx1262_syncWord = 0x3444;
int8_t lora_sx1262_power = 20;
uint16_t lora_sx1262_preambleLength = 12;
float lora_sx1262_tcxoVoltage = 0;
bool lora_sx1262_useRegulatorLDO = false;

int state = radio.begin(lora_sx1262_freq, lora_sx1262_bw, lora_sx1262_sf, lora_sx1262_cr, lora_sx1262_syncWord, lora_sx1262_power, lora_sx1262_preambleLength, lora_sx1262_tcxoVoltage, lora_sx1262_useRegulatorLDO);

from radiolib.