Chengdu Ebyte Electronic Technology Co., Ltd.
E22-230T22S User manual
Copyright ©2012–2018，Chengdu Ebyte Electronic Technology Co.,Ltd.
6
1.4 Function introduction
LoRa spread spectrum
: LoRa direct sequence spread spectrum technology will bring longer communication
distance; low transmit power density, it is not easy to cause interference to other equipment.
High confidentiality
, extremely low probability of interception; strong anti-interference ability, strong
suppression of co-channel interference and various noises; excellent anti-multipath fading performance.
LBT
: The module has a Listen before talk (LBT) function. When this function is enabled, the module actively
monitors the channel environment noise before transmitting. If the noise exceeds the threshold, it will be sent
delayed. This feature can greatly improve the communication success rate of the module in harsh
environments. This function can be used for network transmission and anti-collision processing.
RSSI:
The signal strength indication function. The module supports packet signal strength serial output. Can
be used to assess signal quality, improve communication networks, and ranging. The module supports
ambient noise signal strength serial output. It can be used to implement LBT functions manually.
Wireless configuration
: Remotely configure or read wireless module parameters by sending command
packets wirelessly.
Networking function
: The module can implement multi-level repeater networking. Multi-level repeater is
suitable for ultra long-distance communication. Multiple networks in the same area can run simultaneously.
Ultra-low power consumption
: the air wake-up function. It is especially suitable for battery-powered
applications: when the module is in WOR state, the configuration module WOR monitors the overall power
consumption of the adjustable module. The maximum configurable response delay of the module is 4000ms.
The average current of the module in this mode is about 2uA.
Fixed-point transmission
: supports address function, the host can transmit data to any address, any channel,
to achieve networking, repeater and other application. For example: module A transmits data to module B
(address is 0x00 01, channel is 0x80), date is AA BB CC, the communication format is: 00 01 80 AA BB CC,
where 00 01 is the module B address and 80 is the module B channel, then module B can receive the AA BB
CC (other modules do not receive data).
Broadcast monitoring
: Set the module address to 0xFFFF, which can monitor the data transmission of the
module on the same channel; the transmitted data can be received by the module of any address on the
same channel, thus playing the role of broadcasting and monitoring.
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.
