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E290-900T20S china-made PAN3060 chip solution New ChirploT Spread spectrum technology Single point wake-up Airspeed adaptive IAP Firmware online upgrade
[Introduction]：E290-900T20S is a new generation of wireless module, a UART wireless serial port module based on the Panqiwei PAN3060 RF chip, with multiple transmission modes, working in the (850.125~930.125MHz) frequency band (default 868.125MHz), using spread spectrum technology ChirpIoT™, TTL level output. The wireless module adopts a new generation of ChirpIoT™ spread spectrum technology, supports half-duplex wireless communication, has high anti-interference and high sensitivity; supports air wake-up, wireless configuration, automatic relay, communication key, AT command, IAP upgrade and other functions, supports sub-packet length setting, and can provide customized development services.
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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 (not suspended, if not used, grounded) |
| 6 | M1 | Input (pull up) | Cooperate with M0 to determine the 4 working modes of the module (not suspended, if not used, grounded) |
| 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 prohibited to low
when powered on, otherwise it will enter firmware upgrade mode; The user wakes up the external MCU and outputs a low level during power-on self-test initialization; (can be suspended) |
| 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 down 1ms to reset |
| 13 | GND | - | Module ground wire |
| 14 | NC | - | Hanging, ungroundable |
| 15 | NC | - | Hanging, ungroundable |
| 16 | NC | - | Hanging, ungroundable |
| 17 | NC | - | Hanging, ungroundable |
| 18 | NC | - | Hanging, ungroundable |
| 19 | GND | - | Module ground wire |
| 20 | GND | - | Module ground wire |
| 21 | On | - | antenna |
| 22 | GND | - | Module ground wire |