> ## Documentation Index
> Fetch the complete documentation index at: https://docs.primastem.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Command Chips

> NFC Codes

## 🧭 Movement

| Command         | NFC Code |
| --------------- | -------- |
| Forward         | `cfor`   |
| Left            | `clef`   |
| Right           | `crig`   |
| Backward        | `cbac`   |
| Random Movement | `crnd`   |

## 🔁 Repeat & Control

| Command                       | NFC Code      |
| ----------------------------- | ------------- |
| Repeat 2–999                  | `r002`–`r999` |
| Repeat Random Number (1 to 6) | `rrnd`        |
| Function                      | `cfun`        |
| Pause                         | `cwat`        |

## 🔢 Numbers

| Value         | NFC Code      |
| ------------- | ------------- |
| Numbers 1–999 | `n001`–`n999` |

## 🧮 Math Operations

| Operation        | NFC Code      |
| ---------------- | ------------- |
| +1 to +999       | `a001`–`a999` |
| −1 to −999       | `s001`–`s999` |
| ×N               | `m002`–`m999` |
| ÷N               | `d002`–`d999` |
| X^N              | `e002`–`e999` |
| Square Root of X | `sqrt`        |
| Factorial        | `fact`        |

## ⚙️ Settings

| Command                         | NFC Code |
| ------------------------------- | -------- |
| Calibration                     | `ccal`   |
| Set Default Step Length for map | `clen`   |

## 🔧 Advanced

| Command                                                          | NFC Code |
| ---------------------------------------------------------------- | -------- |
| Audio Sample (see [Audio Files Reference](/en/sounds_reference)) | `xNNN`   |
| Panel Sound Sample                                               | `csou`   |
| Volume Level                                                     | `clvl`   |

## How to Write Data to an NFC Tag

You can create your own token — simply write a text code to an NFC tag. You can use any numbers (from 0 to 999), any repetitions, and any numbers for arithmetic operations.

To write text data to an NFC tag, open the Google Play Store and install the **RFID NFC Reader** or **NFC Tools** app on your phone.

Instructions for writing an NFC tag are here — [youtu.be/UbKaQxZs8JA](https://youtu.be/UbKaQxZs8JA)

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