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E290-400T20S 433 MHz PAN3060 RF chip wireless serial port module support automatic relay networking IAP upgrade AT commands
[Introduction]：E290-400T20S is a wireless serial port module (UART) based on the PAN3060 RF chip, with multiple transmission modes, working in the ( 410.125 ~ 493.125MHz) frequency band (default 433.125MHz), using spread spectrum technology ChirpIoT™ , TTL level output.supports half-duplex wireless communication, and has the characteristics of high anti-interference and high sensitivity.
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| Pin number | Pin name | Pin direction | Pin usage |
| 1 | GND | - | Module ground wire |
| 2 | GND | - | Module ground wire |
| 3 | GND | - | Module ground wire |
| 4 | GND | - | Module ground wire |
| 5 | M0 | input(pull-up) | Cooperate with M1 to determine the 4 working modes of the module (cannot be left floating, can be grounded if not used) |
| 6 | M1 | input(pull-up) | Cooperate with M0 to determine the 4 working modes of the module (cannot be left floating, can be grounded if not used) |
| 7 | RXD | enter | TTL serial port input, connected to the external TXD output pin; |
| 8 | TXD | output | TTL serial port output, connected to the external RXD input pin; |
| 9 | TO | input Output | Used
to indicate the working status of the module; it is forbidden to be low
when powered on, otherwise it will enter the firmware upgrade mode; The user wakes up the external MCU and outputs low level during power-on self-test initialization; (can be left floating) |
| 10 | VCC | - | Module power supply positive reference, voltage range: 2.6~5.5V DC |
| 11 | GND | - | Module ground wire |
| 12 | RST | - | Module reset pin, pull low for 1ms to reset |
| 13 | GND | - | Module ground wire |
| 14 | NC | - | Floating, not grounded |
| 15 | NC | - | Floating, not grounded |
| 16 | NC | - | Floating, not grounded |
| 17 | NC | - | Floating, not grounded |
| 18 | NC | - | Floating, not grounded |
| 19 | GND | - | Module ground wire |
| 20 | GND | - | Module ground wire |
| 21 | ON | - | antenna |
| 22 | GND | - | Module ground wire |