# MeowBit Wireless SD Module

With the Wireless SD Module, we can use Meowbit to communicate with other devices such as Micro:bit.

![](https://kittenbothk-eng.readthedocs.io/en/latest/_images/sd1.png)

![](https://kittenbothk-eng.readthedocs.io/en/latest/_images/sd2.png)

### Specifications

* Chipset: nRF51822 ARM Cortex-M0
* Frequency: 16Mhz
* Dimensions: 24x21X3mm
* Weight: 14g
* Max distance: 10m
* Working Voltage: 3.3V
* Protocols: Wireless 2.4GHz, Bluetooth 2.4G
* Wireless Mode Indicator (Green for 2.4GHz, Blue for Bluetooth)
* Mode Toggle Switch
* Compatible with SD Card slot

### Installation Method

Installation: Insert the module into the SD Card Slot of Meowbit with the golden connectors facing towards you.

![](https://kittenbothk-eng.readthedocs.io/en/latest/_images/sd3.gif)

Removal: Slowly and carefully pull out the module from the slot.

![](https://kittenbothk-eng.readthedocs.io/en/latest/_images/sd4.gif)

### Mode Toggle

The button on the top of the module is for switching between modes.

![](https://kittenbothk-eng.readthedocs.io/en/latest/_images/sd12.gif)

### MakeCode Arcade Coding Tutorial

![](https://kittenbothk-eng.readthedocs.io/en/latest/_images/acbanner1.png)

#### Load the extension for the wireless module

Wireless Extension: <https://github.com/KittenBot/pxt-sdwireless>

#### [Loading Extensions](https://sharinghub-eng.kittenbot.hk/programming-platforms/makecode-tutorial/kittenbot-and-makecode)

![](https://kittenbothk-eng.readthedocs.io/en/latest/_images/sd5_1.png)

![](https://kittenbothk-eng.readthedocs.io/en/latest/_images/sd6_1.png)

#### Blocks for the wireless module

![](https://kittenbothk-eng.readthedocs.io/en/latest/_images/sd7_1.png)

#### MakeCode Arcade Error Message

```
This error message may appear in MakeCode Arcade when using the wireless module, this is simply because the emulator cannot emulate the wireless module.
Please ignore and continue.
```

![](https://kittenbothk-eng.readthedocs.io/en/latest/_images/sd13.png)

#### Sending data

Data can be sent from Meowbit to the Micro:bit using the 2.4GHz radio.

**Meowbit Coding**

![](https://kittenbothk-eng.readthedocs.io/en/latest/_images/sd8_1.png)

[Sample Code Link](https://makecode.com/_CTHU6hP81P6U)

**Microbit Coding**

![](https://kittenbothk-eng.readthedocs.io/en/latest/_images/sd9_1.png)

[Sample Code Link](https://makecode.microbit.org/_R8zKEpixPazc)

**Pressing A or B on the Meowbit causes Micro:bit to display different icons**

#### Receiving data

Meowbit can also receive data from a Micro:bit using the 2.4GHz radio.

**Meowbit Coding**

![](https://kittenbothk-eng.readthedocs.io/en/latest/_images/sd11_1.png)

[Sample Code Link](https://makecode.com/_KDPdA0XccXvP)

**Microbit Coding**

![](https://kittenbothk-eng.readthedocs.io/en/latest/_images/sd10_1.png)

[Sample Code Link](https://makecode.microbit.org/_Xx39ryM2CTp9)

**Pressing A or B on the Micro:bit causes Meowbit to display different text.**