ESP-01M is a compact Wi-Fi module using the ESP8266 chip. It operates at 2.4 GHz frequency and offers low power consumption and high performance. It easily communicates data with devices via UART.
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| Item | ESP-01M |
|---|---|
| Voltage Supply | 3.3V – 5V |
| Functions | Wi-Fi SOC Module |
| Communacation | UART (Default Baud: 74880 kbps) |
| Operating Temperature | -40°C to 85°C |
| Board Dimensions | 20 x 20 mm |
| PIN Number | PIN Name | Description |
|---|---|---|
| 1 | 5V | Positive Power Supply |
| 2 | RST | External reset signal (active low for reset) |
| 3 | TX | UART TX |
| 4 | RX | UART RX |
| 5 | IO0 | GPIO0 |
| 6 | GND | Negative Power Supply |
| PIN Number | PIN Name | Description |
|---|---|---|
| 1 | PPS | Time pulse signal |
| 2 | N/F | Shutdown control, keep high level during normal |
| 3 | RST | External reset input, internal pull-up, it must be left. |
| 4 | GPS-BDS | When HIGH level or floating, it is BDS+GPS. (Actually this pin is 3.3V power pin, middle pin is gps io pin; when you short-jumper it together io pin will be HIGH. ) |
| 5 | GLNSS-GPS | When LOW level, it is GPS+GLONASS. (Actually this pin is GND power pin, middle pin is gps io pin; when you short-jumper it together io pin will be LOW. ) |
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