The LoRa module LoRa1276 integrates Semtech RF transceiver chip SX1276, which adopts LoRa Spread Spectrum modulation frequency hopping technique. Its communication distance and receiving sensitivity are much better than the current FSK and GFSK modulation. Multi-signal won't affect each other even in crowd frequency environment; it comes with strong anti-interference performance. This module antenna switch is integrated and controlled by the chip. Its compact size is matched with an output power of 100mw. It can be widely used in wireless meter reading, remote industrial control and other industries.

Features

n Built-in ESD Protection，Built-in temperature sensor and Low Battery Indicator

n 127 dB Dynamic Range RSSI

n Packet engine up to 256 bytes with FiFo and CRC

n Data transfer rate: 1.2-300 Kbps @FSK  0.018-37.5 Kbps @Lora

n Low RX current：10.8 mA

n Sleep current< 1.5uA

n Sensitivity: -139dBm @Lora

n Maximum output power:20 dBm

The above briefly introduced the common attributes of LoRa127X and LoRa127X-C1.

 Now let's discuss the differences between the two series,startingwith the product model numbers.

LoRa127X series

 LoRa127X-C1 series

Different certifications

By comparing the above two series, we can see that both standard and custom frequency bands are the same, but there are differences in product certifications. LoRa1276-915 is FCC ID certified, while LoRa1276-C1-915 is certified by FCC ID and IC ID, and the 868MHz band is CE certified. 

Different pin definitions

LoRa127X-C1 Pin definition

LoRa127X Pin definition

Comparing the two pinout diagrams, it can be seen that the pin definitions of LoRa127X and LoRa127X-C1 are different. This is the biggest difference between these two series of modules, with LoRa127X-C1 having an additional 3 digital I/Os and a different pinout sequence. This is to accommodate the diverse needs of more customers.

Different Mechanical dimension 

In summary, both the LoRa127X and LoRa127X-C1 series wireless modules use the same main chip, and their product features are the same. The main difference lies in the product certifications. Additionally, to accommodate diverse customer needs, the LoRa127X-C1 series modules have modified pinouts, resulting in changes in module size.