About the LMIC category

The LMIC category is for everything related to the LMIC LoRaWAN library.

Greetings , my board is TTGO t-beam v1.1 .i install the library LMIC node .and want to try it with ABP .so i chose my board in the platformio.ini file , and insert the TTN keys(appskey,nwskey,devicaddr). The output message in serial monitor is the following :

LMIC-node

Device-id:
LMIC library: MCCI
Activation: ABP
Interval: 20 seconds
Error: hardware init failed.

abort() was called at PC 0x400d1e2f on core 1

Backtrace:0x40083311:0x3ffb27400x4008917d:0x3ffb2760 0x4008dd89:0x3ffb2780 0x400d1e2f:0x3ffb2800 0x400d8dca:0x3ffb2820

ELF file SHA256: 0000000000000000

Rebooting…
ets Jul 29 2019 12:21:46

rst:0xc (SW_CPU_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0030,len:1184
load:0x40078000,len:12812
load:0x40080400,len:3032
entry 0x400805e4
[ 887][E][Wire

Any help please!