Ebyte E22-900MM22S, Product Specifications

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Chengdu Ebyte Electronic Technology Co.,Ltd E22-900M22S User manual
Copyright ©2012–2018
，Chengdu Ebyte Electronic Technology Co.,Ltd
6
 Antenna installation structure has a great impact on module performance, so make sure the antenna is exposed,
preferably vertically up. When the module is installed inside the enclosure, the antenna extension cable
can be used to extend the antenna outside the enclosure.
 The antenna must not be mounted inside a metal shell, which weakens the transmission range.

It is recommended to add a 200R protection resistor to the RXD/TXD of the external MCU.
4.2 Software programming

This module is SX1268/PA+LNA, and its driving mode is exactly the same as SX1268/SX1262, users
can operate in accordance with the SX1268/SX1262 chip volume.

DIO1, DIO2 are generic IO ports that can be configured for many functions. DIO2 can be connected with TXEN,
not with the IO port of MCU, and used to control the RF switch emission. See SX1262 manual for details. If
not used, it can be suspended.

Use a DIO3 to power a 32MHz TCXO crystal internally.
Chapter 5 basic application
5.1 Basic circuit