[Frequency]：410.125~493.125MHz
[Power]：22dBm
[Distance]：5km
[Size]：21*36mm
[Weight]：6.7±0.2g
[Introduction]：E22-400T22D is a wireless serial port module (UART) based on SEMTECH LoRa solution. It has a variety of transmission modes, working at 410.125MHz~493.125MHz, frequency (default 433.125MHz), LoRa spread spectrum technology, TTL level output, compatible with 3.3V and 5V IO port voltage.
| Main Parameters | Value | Remarks | |
| 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 | Industrial grade |
| Main Parameters | Value | Remarks | ||
| Min. | Typical | 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 may be at risk of burning down |
| Operating temperature（℃） | -40 | - | 85 | Industrial design |
| Operating frequency（MHz） | 410.125 | 433.125 | 493.125 | Support ISM band |
| TX Current(mA) | - | 110 | - | Instant power consumption |
| RX current（mA） | - | 12 | - | - |
| 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 0.3 kbps |
| Air data rate（bps） | 2.4k | - | 62.5k | Controlled via user’s programming |
| Main parameter | Description | Remarks |
| Distance for reference | 5km | Test condition：clear and open area, antenna gain: 5dBi，antenna height:2.5m，air data rate: 2.4kbps |
| TX length | 240 Byte | Can be configured via command as 32/64/128/240 bytes per packet totransmit |
| Buffer | 1000 Byte | - |
| Modulation | LoRa | New generation LoRa modulation technology |
| Communication interface | UART | TTL level |
| Package | DIP | - |
| Connector | 1*7*2.54mm | - |
| Size | 21*36 mm | - |
| Antenna | SMA | 50 ohm impedance |
| No. | Name | Direction | Function |
|---|---|---|---|
| 1 | M0 | Input（weak pull-up） | Work with M1 to decide 4 working modes of module (not suspended, if not used, could be grounded). |
| 2 | M1 | Input（weak pull-up） | Work with M0 to decide 4 working modes of module (not suspended, if notused, could be grounded). |
| 3 | RXD | Input | TTL UART input, connects to external TXD output pin. |
| 4 | TXD | Output | TTL UART output, connects to external RXD input pin. |
| 5 | AUX | Output | To indicate module ’s working status & wakes up the external MCU. Duringthe procedure of self-check initialization, the pin outputs low level. |
| 6 | VCC | Power supply | Module power supply positive reference, voltage range: 2.3 ～ 5.5V DC |
| 7 | GND | Power supply | Ground |
| 8 | Fixed hole | - | Fixed hole（Connect to GND on the module） |
| 9 | Fixed hole | - | Fixed hole（Connect to GND on the module） |
| 10 | Fixed hole | - | Fixed hole（Connect to GND on the module） |
