Chengdu Ebyte Electronic Technology Co., Ltd.
E22-900T22S1C User manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd.
6
Forward error correction
: The module has FEC forward error correction algorithm, which has high coding efficiency and
strong error correction capability. In the case of sudden interference, it can actively correct the interfered data packets,
greatly improving reliability and transmission distance. When without FEC, such packets can only be discarded.
Deep sleep function
: When the module is in sleep mode, mode 3, the wireless receiver is turned off and the
micro-controller is in a sleep state; at this time, the power consumption of the whole device is about 2uA.
Watchdog
: The module has a built-in watchdog and performs precise time layout. Once an exception occurs, the
module will restart within 1 second and continue to work according to the previous parameter settings.
Parameter saving
: After the user sets the parameters, the module parameters will be saved, the power will not be lost,
and the module will work according to the set parameters after power-on.
Applicable environment
: 900MHz is free frequency band, users can use it directly without application; 900MHz features
certain penetration and diffraction ability, suitable for environment with small data volume, long transmission distance
and easy to be interfered.
2. Specification and parameter
2.1 Limit parameter
Main parameter
Performance
Remark
Min.
Max.
Power supply（V）
0
5.5
Voltage over 5.5V will cause permanent
damage to module
Blocking power（dBm）
-
10
Chances of burn is slim when modules
are used in short distance
Operating temperature（℃）
-40
85
/
2.2 Operating parameter
Main parameter
Performance
Remark
Min.
Typ.
Max.
Operating voltage（V）
2.3
5.0
5.5
≥5.0 V ensures output power
Communication level（V）
3.3
For 5V TTL, It is recommended to add
level conversion
Operating temperature（℃）
-40
-
85
Industrial design
Operating frequency（MHz）
850.125
-
930.125
Support ISM band
Power
consump
tion
TX current（mA）
155
Instant power consumption
RX current（mA）
11
Sleep current （μA）
2
Software is shut down
Max Tx power（dBm）
21.5
22.0
22.5
Receiving sensitivity（dBm）
-146
-147
-148
Air data rate is 2.4kbps
Air data rate（bps）
0.3k
2.4k
62.5k
Controlled via user’s programming
