m5-docs/docs/en/base/m5go_bottom.md

# Base M5GO BOTTOM

<el-tag effect="plain">SKU:A014</el-tag>

<div class="product_pic"><img src="assets/img/product_pics/base/m5go_base_04.webp"><img src="assets/img/product_pics/base/m5go_base_05.webp"></div>

## Description

**M5GO BOTTOM** is apparently the bottom part of M5GO which is a upgrade of basic bottoms, with a larger battery(500mAh),Analog Micphone, LED Bar , two more HY2.0 PORT(PORT B/PORT C)，and more. Its back is compatible with Lego holes, and the pogo pin can be used to connect to supported I2C devices (such as BALA) or magnetic charging bases.

## Product Features

- Compatible with M5Core
- Integrated Mic/LED Strip/HY2.0 interface
- Support UIFlow directly
- Compatible with Lego blocks
- Configurable magnetic charging base

## Include

- 1x M5GO BOTTOM
- 2x M3x16 Screws

## Specification

<table>
   <tr style="font-weight:bold">
      <td>Resources</td>
      <td>Parameter</td>
   </tr>
   <tr>
      <td>Net weight</td>
      <td>31g</td>
   </tr>
   <tr>
      <td>Gross weight</td>
      <td>49g</td>
   </tr>
   <tr>
      <td>Product Size</td>
      <td>54*54*8mm</td>
   </tr>
   <tr>
      <td>Package Size</td>
      <td>60*57*17mm</td>
   </tr>
 </table>


## PinMap

**Pogo Pin**

| POGO Pin       | ESP32 Chip    |
| :----------:  |:------------: |
| SCL           | GPIO22        |
| SDA           | GPIO21        |

**LED Bar**

*There are 10 RGB Leds built in M5GO Base*

| LED Pin       | ESP32 Chip    |
| :----------:  |:------------: |
| LED Pin           | GPIO15        |

**Analog MIC**

Analog Microphone 

| MIC Pin       | ESP32 Chip    |
| :----------:  |:------------: |
| MIC Pin           | GPIO34        |

**CONNEXT**

| PORT B(I/O)       | ESP32 Chip    |
| :----------:  |:------------: |
| G36           | GPIO36        |
| G26           | GPIO26        |
| 5V            | 5V            |
| GND           | GND           |

| PORT C(UART2)       | ESP32 Chip    |
| :----------:  |:------------: |
| RXD           | GPIO16        |
| TXD           | GPIO17        |
| 5V            | 5V            |
| GND           | GND           |

**M-Bus**

<img src="assets/img/product_pics/core/M-BUS.webp" alt="M_BUS">


<img src="assets/img/product_pics/base/m5go_base_01.webp" width="65%" height="65%">

<img src="assets/img/product_pics/base/m5go_base_02.webp" width="65%" height="65%">

## Related Link

- **[M5GO IoT Starter Kit Purchase](https://www.aliexpress.com/store/product/M5Stack-Official-Stock-Offer-M5GO-IoT-Starter-Kit-ESP32-for-Arduino-MicroPython-Programming-Development-IR-MIC/3226069_32881911596.html?spm=2114.12010615.8148356.2.52385ab04i7vIu)**

## Schematic

<img src="assets/img/product_pics/base/m5go_base_sch.webp">


<script>

   var purchase_link = 'https://m5stack.com/collections/m5-base/products/battery-bottom-charging-base';

   anchor_search(purchase_link);
   scrollFunc();

</script>