EBYTE E22-900T30DC SX1262 868M/915M 30DBM DIP New Lora Wireless Module User Manual

EBYTE E22-900T30DC User Manual

SX1262 868M/915M 30dBm DIP new LoRa Wireless Module

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Overview

Introduction

E22-900T30DC is a wireless module (UART) based on SX1262 with multiple transmission modes, working in the 850.125MHz~930.125MHz, (default 868.125MHz). It features LoRa spread spectrum technology, TTL level output, compatible with 3.3V and 5V IO port voltage.

E22-900T30DC adopts a new generation of LoRa spread spectrum technology. Compared with the traditional SX1278 solution, it has a longer transmission distance, faster speed, lower power consumption, and smaller size; it supports functions such as air wake-up, wireless configuration, carrier monitoring, automatic relay. communication keys and sub-package length setting. Ebyte provides customized development services on it.

Features

• SX1262 LoRa chip brings further communication distance and stronger anti-interference ability;
• Supports automatic relay network, multilevel relay used in long distance communication, the same area to run multiple network running at the same time;
• The communication allows users to set key that cannot be read, greatly improving the user data privacy;
• Supports LBT function, before sending channel environmental noise monitoring, can greatly increase the success rate of communication module in harsh environment;
• RSSI signal strength indicator function, can be used to assess the signal quality, improve the communication network and distance;
• Wireless parameters configuration, sent via wireless instruction packet, or read a wireless remote configuration module parameters;
• Air wake up, that is, ultra-low power consumption function, suitable for a battery-powered application solutions;
• Supports fixed transmission, radio transmission, channel to monitor;
• Deep sleep mode enables 2 uA power consumption;
• Global free license ISM 868/915 MHZ band;
• Under ideal conditions, the communication distance can be up to 10 km;
• Supports parameter electricity saving, electricity again after the module will work according to set good parameters;
• Effective watchdog design, once an exception occurs, the module will be in automatic restart, and can continue to work on previous parameter;
• 0.3 k ~ 62.5 kbps air data rate;
• 3.3 V to 5.5 V power supply, over 5V power supply can ensure the best performance;
• Industry-standard design, support – 40 ~ + 85 ℃ under long time use;
• Size and shape are consistent with E32 series module, which can be directly replaced to improve performance and distance.

Application

• Home security alarm and remote keyless entry;
• Smart home and industrial sensors;
• Wireless alarm security system;
• Building automation solutions;
• Wireless industrial-grade remote control;
• Health care products;
• Advanced Meter Reading Architecture(AMI);
• Automotive industry applications.

Specification and parameter

Limit parameter

Operating parameter

Size and pin definition

Connect to MCU

Function description

Fixed transmission

Broadcasting transmission

Broadcasting address

• For example: Set the address of module A as OxFFFF or 0x0000, and the channel as 0x04;
• When module is the transmitter (transparent transmission), all modules under channel Ox04 will receive the data, the purpose of broadcast is realized.

Monitor address

• For example: Set the address of module A as OxFFFF or Ox0000, and the channel as Ox04;
• When module A is the receiver, it can receive the data sent from all modules under channel 0x04, the purpose of monitor is realized.

Reset

• When the module is powered, AUX outputs low level immediately, conducts hardware self-check and sets the operating mode based on user’s parameters. During the process, the AUX remains low level. After the process completed, the AUX outputs high level and starts to work as per the operating mode combined by MI and MO. Therefore, users need to wait the AUX rising edge as the start of module’s normal work.

AUX description

• AUX Pin can be used as indication for wireless send & receive buffer and self-check.
• It can indicate whether there are data that are not sent yet via wireless way, or whether all wireless data has been sent through ART, or whether the module is still in the process of self-check initialization.

Indication of UART output

• To wake up external MCU

Indication of wireless transmitting

Buffer (empty): the internal 1000 bytes data in the buffer are written to the RFIC (Auto sub-packaging). When AUX=1, the user can input data less than 1000 bytes continuously without overflow. Buffer (not empty): when AUX=0, the internal 1000 bytes data in the buffer have not been written to the RFIC completely. If the user starts to transmit data at this circumstance, it may cause overtime when the module is waiting for the user data, or transmitting wireless sub package. When AUX = 1, it does not mean that all the UART data of the module have been transmitted already, perhaps the last packet of data is still in transmission.

Configuration procedure of module

• Only happened when power-on resetting or exiting sleep mode

Notes for AUX

Operating mode

There are four operating modes, which are set by Ml and MO, the details are as follows:

Mode switching

Normal mode (Mode 0)

WOR mode (Mode 1)

Configuration mode (Mode 2)

Deep sleep mode (Mode 3)

Register read and write control

Command format

In configuration mode (mode 2: Ml = 1. MO = 0). the list of supported commands are as follows (only 9600. 8N1 format is supported when):

Register description

Factory default parameter

Repeater networking mode

Repeater networking rules:

1. Forwarding rules, the repeater can forward data in both directions between two NETIDs.
2. In repeater mode, ADDH\ADDL is no longer used as the module address, and it is used as a NETID forwarding pairing flag.
   Figure:
   (1) Primary repeater
   “Node 1” NETID is 08.
   “Node 2” NETID is 33.
   Primary repeater 1‘s ’ADDH\ADDL are 08，33.
   So the signal sent by node 1 (08) can be forwarded to node 2 (33)
   At the same time, node 1 and node 2 have the same address, so the data transmitted by node 1 can be received by node 2.
   (2) Secondary repeater
   Secondary repeater’s ADDH\ADDL are 33，05.
   Therefore, Repeater 2 can forward the data of Repeater 1 to the network NETID:

3. Thus node 3 and node 4 can receive node 1 data. Node 4 outputs data normally, and node 3 has a different address than node 1, so no data is output.
   (3) Two-way repeater
   As shown in the figure: the data sent by node 1, the nodes 2, 4 can receive the data sent by node 2, 4, and node 1 can also receive it

Configuration instructions on computer

• The following figure shows the E22-900T30DC configuration host computer display interface, the user can switch to the command mode through MOM, and quickly configure and read the parameters on computer.

• In the configuration on computer, the module address, frequency channel, network ID, and key are all in decimal mode. The range of values of each parameter is:

Network address: 0-65535
Frequency channel: 0-80
Network ID: 0-255
Key: 0-65535

When the user configures the repeater mode using the host computer, special attention must be paid. Since the parameters are in decimal mode in the host computer, the module address and network ID need to be converted into hexadecimal. For example, if the network ID input by the transmitting end A is 02, and the network ID input by the receiving end B is 10, when the repeater end R sets the module address, the hexadecimal value OX020A is converted into the decimal value 522 as the repeater end R. Module address. That is, the module address value of the repeater terminal R is 522 at this time.

Hardware design

• It is recommended to use a DC stabilized power supply. The power supply ripple factor is as small as possible, and the module needs to be reliably grounded. ;
• Please pay attention to the correct connection of the positive and negative poles of the power supply. Reverse connection may cause permanent damage to the module ;
• Please check the power supply to ensure it is within the recommended voltage otherwise when it exceeds the maximum value the module will be permanently damaged ;
• Please check the stability of the power supply, the voltage can not be fluctuated frequently ;
• When designing the power supply circuit for the module, it is often recommended to reserve more than 30% of the margin, so the whole machine is beneficial for long-term stable operation.
• The module should be as far away as possible from the power supply, transformers, high-frequency wiring and other parts with large electromagnetic interference.
• High-frequency digital routing, high-frequency analog routing, and power routing must be avoided under the module. If it is necessary to pass through the module, assume that the module is soldered to the Top Layer, and the copper is spread on the Top Layer of the module contact part(well grounded), it must be close to the digital part of the module and routed in the Bottom Layer
• Assuming the module is soldered or placed over the Top Layer, it is wrong to randomly route over the Bottom Layer or other layers, which will affect the module’s spurs and receiving sensitivity to varying degrees;
• It is assumed that there are devices with large electromagnetic interference around the module that will greatly affect the performance. It is recommended to keep them away from the module according to the strength of the interference. If necessary, appropriate isolation and shielding can be done ;
• Assume that there are traces with large electromagnetic interference (high-frequency digital, high-frequency analog, power traces) around the module that will greatly affect the performance of the module. It is recommended to stay away from the module according to the strength of the interference.If necessary, appropriate isolation and shielding can be done.
• If the communication line uses a 5V level, a Ik-5.1k resistor must be connected in series (not recommended, there is still a risk of damage) ;
• Try to stay away from some physical layers such as TTL protocol at 2.4GHz, for example: USB3.0 ;
• The mounting structure of antenna has a great influence on the performance of the module. It is necessary to ensure that the antenna is exposed, preferably vertically upward. When the module is mounted inside the case, use a good antenna extension cable to extend the antenna to the outside ;
• The antenna must not be installed inside the metal case, which will cause the transmission distance to be greatly weakened.

FAQ

Communication range is too short

• The communication distance will be affected when obstacle exists.
• Data lose rate will be affected by temperature, humidity and co-channel interference.
• The ground will absorb and reflect wireless radio wave, so the performance will be poor when testing near ground.
• Sea water has great ability in absorbing wireless radio wave, so performance will be poor when testing near the sea.
• The signal will be affected when the antenna is near metal object or put in a metal case.
• Power register was set incorrectly, air data rate is set as too high (the higher the air data rate, the shorter the distance).
• The power supply low voltage under room temperature is lower than 2.5V, the lower the voltage, the lower the transmitting power.
• Due to antenna quality or poor matching between antenna and module.

Module is easy to damage

• Please check the power supply source, ensure it is in right range, voltage higher than max value will damage the module.
• Please check the stability of power source, the voltage cannot fluctuate too much.
• Please make sure antistatic measure are taken when installing and using, high frequency devices have electrostatic susceptibility.
• Please ensure the humidity is within limited range, some parts are sensitive to humidity.
• Please avoid using modules under too high or too low temperature.

BER(Bit Error Rate) is high

• There are co-channel signal interference nearby, please be away from interference sources or modify frequency and channel to avoid interference;
• Poor power supply may cause messy code. Make sure that the power supply is reliable.
• The extension line and feeder quality are poor or too long, so the bit error rate is high;

Production guidance

Reflow soldering temperature

Reflow soldering curve

E22 series

Antenna recommendation

The antenna is an important role in the communication process. A good antenna can largely improve the communication system. Therefore, we recommend some antennas for wireless modules with excellent performance and reasonable price.

Package for bulk order

Revision history

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