SX127X and SX126X devices need completly different libraries but are interoperable at the LoRa level.
However, an SX1276 and ESP8266 is not a TTN compatible setup.
SX127X and SX126X devices need completly different libraries but are interoperable at the LoRa level.
However, an SX1276 and ESP8266 is not a TTN compatible setup.