yes it is 8 channel dragino, actually i am able to send data to TTN via both OTAA and ABP, but the problem is the reliablity of the MCU… it get stucked… BTW. i have tested this RA-01 on diffrent MCU, mega2560, pro mini, stm32f103
with STM32F103, It is able to send only and only one data on ABP, while on atmel MCU they can send muntiple times but may hang any time and stops in between
my lora module is this one