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E610-900T20S Automatic relay networking; communication key; 868MHz/915MHz frequency band; high-speed continuous transmission module
[Introduction]：E610-900T20S is a high-speed continuous transmission 433M wireless data transmission module developed by Ebyte, with built-in high-performance microcontroller and wireless transceiver chip. Working in the 855~870MHz, 902~928MHz frequency bands (default 900MHz), the transmit power is 20dBm. It is suitable for scenarios that require rapid transmission of large amounts of data, such as high-speed sensing, surveying, mapping, measurement and control, remote sensing positioning, etc.
| No. | Pin | Pin Direction | Remarks |
| 1 | NC | - | Empty feet |
| 2 | GND | - | Module ground wire |
| 3 | NC | - | Empty feet |
| 4 | nNEST | Output | Module reset pin, low level reset |
| 5 | NC | - | Empty feet |
| 6 | NC | - | Empty feet |
| 7 | NC | - | Empty feet |
| 8 | GND | - | Module ground wire |
| 11 | GND | - | Module ground wire |
| 12 | ANT | - | antenna |
| 13 | GND | - | Module ground wire |
| 14 | GND | - | Module ground wire |
| 15 | GND | - | Module ground wire |
| 16 | GND | - | Module ground wire |
| 19 | GND | - | Module ground wire |
| 20 | M0 | Input (very weak pull-up) | Cooperate with M1 to determine the 4 working modes of the module (cannot be left floating, can be grounded if not used) |
| 21 | M1 | Input (very weak pull-up) | Cooperate with M0 to determine the 4 working modes of the module (cannot be left floating, can be grounded if not used) |
| 22 | RXD | Input | TTL serial port input, connected to the external TXD output pin; |
| 23 | TXD | output | TTL serial port output, connected to the external RXD input pin; |
| 24 | AUX | output | Used to indicate the working status of the module; the user wakes up the external MCU and outputs low level during power-on self-test initialization; (can be left floating) |
| 25 | VCC | - | Module power supply positive reference, voltage range: 1.8~3.6V DC |
| 26 | GND | - | Module ground wire |