E220-900T30S LLCC68 chip LoRa wireless serial port module LoRa spread spectrum technology
[Size]：25*40.5mm
[IC]：LLCC68
[Frequency]：850.125~930.125MHz
[Power]：30dBm
[Distance]：10km
[Product weight]：5.1g±0.1g
[Introduction]：E220-900T30S is a new generation of LoRa wireless serial port module(UART), based on Semtech's original LLCC68 chip design. It has a variety of transmission methods, works in the (850.125～930.125MHz) frequency band(default 873.125MHz), LoRa spread spectrum technology, TTL level output, compatible with 3.3V and 5V IO port voltage.
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| serial number | pin | Pin direction | Remark |
| 1 | GND | Input | Module ground |
| 2 | VCC | Input | Positive reference of module power supply, voltage range: 3.3～5.5V DC |
| 3 | AUX | output | Used
to indicate the working status of the module; the user wakes up the
external MCU, and the output is low during the initialization of the
power-on self-test Level; (can be suspended) |
| 4 | TXD | output | TTL serial port output, connected to external RXD input pin; |
| 5 | RXD | enter | TTL serial port input, connected to the external TXD output pin; |
| 6 | M1 | Input (very weak pull-up) | Cooperate with M0 to determine the 4 working modes of the module (not floating, if not used, it can be grounded) |
| 7 | M0 | Input (very weak pull-up) | Cooperate with M1 to determine the 4 working modes of the module (not floating, if not used, it can be grounded) |
| 11 | ANT | output | Antenna interface (high frequency signal output, 50 ohm characteristic impedance) |
| 12 | GND | - | Fixedly |
| 13 | GND | - | Fixedly |
| 14 | GND | - | Fixedly |
| 18 | NC | - | Empty feet |
| 19 | NC | - | Empty feet |
| 20 | NC | - | Empty feet |
| 21 | NC | - | Empty feet |
| 22 | RESET | Input | Module
reset pin, low level trigger, it is recommended that customers use a
single chip microcomputer connection, reset processing and resume work
in unexpected situations |
| 23 | GND | - | Fixed ground |
| 24 | NC | - | Empty feet |