# Technical Specifications

|                           | **WiSer-USB**                                                                                                                                                                                                                                                                                                                                                  | **WiSer-TTL**                                                                                                                                                                                                                                                                                                                                                                     |
| ------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **Processing Unit**       | Espressif Systems ESP32-S2 Wireless SoC                                                                                                                                                                                                                                                                                                                        | Espressif Systems ESP32-S2 Wireless SoC                                                                                                                                                                                                                                                                                                                                           |
| **Wireless Protocol**     | IEEE 802.11 b/g/n 2.4GHz                                                                                                                                                                                                                                                                                                                                       | IEEE 802.11 b/g/n 2.4GHz                                                                                                                                                                                                                                                                                                                                                          |
| **Supported Platforms**   | Windows, Linux, Mac and Android                                                                                                                                                                                                                                                                                                                                | -                                                                                                                                                                                                                                                                                                                                                                                 |
| **Serial Port**           | <p><strong>Baud Rate:</strong> All standard and custom rates up to 921,600 baud</p><p><strong>Data bits:</strong> 6-bit, 7-bit, 8-bit</p><p><strong>Parity types:</strong> NONE, ODD, EVEN, MARK, and SPACE</p><p><strong>Stop bits:</strong> 1-bit, 1.5-bit, 2-bit</p><p><strong>Flow control:</strong> software (XON/XOFF), hardware (RTS/CTS), and None</p> | -                                                                                                                                                                                                                                                                                                                                                                                 |
| **User Indication**       | 2 red LEDs for RX and TX indication                                                                                                                                                                                                                                                                                                                            | 3 red LEDs for RX, TX and CONN indication                                                                                                                                                                                                                                                                                                                                         |
| **Buttons**               | <p><strong>FIND-PAIR button:</strong> To locate the paired device</p><p><strong>BOOT button:</strong> for FW upgrade</p>                                                                                                                                                                                                                                       | **BOOT button:** for FW upgrade                                                                                                                                                                                                                                                                                                                                                   |
| **Connectors**            | **USB Type-C male plug:** For power supply, serial data communication and firmware upgrade                                                                                                                                                                                                                                                                     | <p><strong>USB Type-C Female port:</strong> For Power supply and firmware upgrade</p><p><strong>Power supply Input Pins:</strong> To supply power using Jumper cables</p><p><strong>Serial Interface Pins:</strong></p><ul><li>3V3, TXD, RXD, RTS, CTS, DTR, VCC, GND</li></ul><p>(Note: 3V3 and VCC are power supply output pins which can be used to power external boards)</p> |
| **IO Pin tolerances**     | -                                                                                                                                                                                                                                                                                                                                                              | <p><strong>Voltage range:</strong> 0 to 3.3V</p><p><strong>Output Pin Current:</strong> 25 mA</p><p><strong>Input Pin Current:</strong> 50nA</p>                                                                                                                                                                                                                                  |
| **Power Supply**          | 5V @ 500mA                                                                                                                                                                                                                                                                                                                                                     | 5V @ 500mA                                                                                                                                                                                                                                                                                                                                                                        |
| **Antenna Type**          | Omnidirectional chip antenna with 0.5 dBi gain (Peak)                                                                                                                                                                                                                                                                                                          | Omnidirectional chip antenna with 0.5 dBi gain (Peak)                                                                                                                                                                                                                                                                                                                             |
| **Dimensions**            | <p><strong>With enclosure:</strong> 37.8 x 20.4 x 8.2 mm</p><p><strong>Without enclosure:</strong> 35.8 x 14.4 x 4.7 mm</p>                                                                                                                                                                                                                                    | <p><strong>With enclosure:</strong> 36.5 x 38.4 x 9.8 mm</p><p><strong>Without enclosure and header pins:</strong> 28 x 29 x 4.3 mm</p>                                                                                                                                                                                                                                           |
| **Weight**                | <p><strong>With enclosure:</strong> 4.5 grams</p><p><strong>Without enclosure:</strong> 1.6 grams</p>                                                                                                                                                                                                                                                          | <p><strong>With enclosure:</strong> 10.5 grams</p><p><strong>Without enclosure:</strong> 3.7 grams</p>                                                                                                                                                                                                                                                                            |
| **Operating Temperature** | -40 to 85 °C                                                                                                                                                                                                                                                                                                                                                   | -40 to 85 °C                                                                                                                                                                                                                                                                                                                                                                      |
| **Humidity**              | < 60% RH (Non-condensing)                                                                                                                                                                                                                                                                                                                                      | < 60% RH (Non-condensing)                                                                                                                                                                                                                                                                                                                                                         |


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://bitmerse.gitbook.io/wiser-product-spec-sheet/technical-specifications.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.