[Communication interface]： UART
[Working frequency]：860.125~932.125MHz
[Transmission power]：13dBm
[Communication distance]： 1.0km
[Antenna interface]：IPEX/stamp hole
[Product size]：16*26mm
[Introduction]：E330-900T13S is a small size, low power consumption, low-cost ultra-high cost-effective wireless serial port module, integrated transceiver, covering 868, 900MHz frequency band. The wireless module supports transparent transmission, fixed-point transmission mode, supports LDC single-point wake-up, software multi-level airspeed adjustable, and can be applied to a variety of wireless transmission applications. At the same time, the module is simple and easy to use, and you can get started quickly without complicated configuration, so that it can be used out of the box.
| No. | Pin | Pin Direction | Remarks |
| 1 | GND | - | Module ground |
| 2 | GND | - | Module ground |
| 3 | GND | - | Module ground |
| 4 | GND | - | Module ground |
| 5 | M0 | input (pull-up) | Cooperate with M1 to determine the 4 working modes of the module. (not floating, if not used, grounded) |
| 6 | M1 | input (pull-up) | Cooperate with M0 to determine the 4 working modes of the module. (not floating, 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 external RXD input pin; |
| 9 | AUX | output | Used to indicate the working status of the module; the user wakes up the external MCU, and outputs a low level during the initialization of the power-on self-test; (can be suspended) |
| 10 | VCC | - | Module power supply positive reference, reference voltage range: 3.3~5.0V DC |
| 11 | GND | - | Module ground |
| 12 | NC | reserve | (OCDSCK) |
| 13 | GND | - | Module ground |
| 14 | NC | reserve | - |
| 15 | NC | reserve | - |
| 16 | PA4 | reserve | - |
| 17 | PA2 | reserve | - |
| 18 | GPI03 | reserve | - |
| 19 | GND | - | Module ground |
| 20 | GND | - | Module ground |
| 21 | ANT | - | antenna |
| 22 | GND | - | Module ground |