Sorry for delay replay. Have you already found the solution?

Hello,

Does anybody know what is the configuration for TTGO TCALL to run pppos_client example ?
Currently I put :
CONFIG_MODEM_TX_PIN=26
CONFIG_MODEM_RX_PIN=27

But I do not find the values for these ones and the example does not work :
CONFIG_MODEM_RTS_PIN=
CONFIG_MODEM_CTS_PIN=

I took info ...

Hi! The TX pin shoud be 27 and RX pin 26. RTS and CTS doesn't matter. Don't forget that you should turn on the sim800 module before call sim800_init().