> For the complete documentation index, see [llms.txt](https://docs.pikonek.com/pikonek/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.pikonek.com/pikonek/guides/how-to-build-pikonek-wifi-vendo-with-coin-acceptor.md).

# How to build pikonek wifi vendo with coin acceptor

This guide will show you how to set up the coinslot on your raspberry pi.

### Requirements

* Raspberry Pi 4 or 3B+ with 16GB SD Card
* Universal Coin Acceptor
* 12V and 5V power supply
* USB-to-Ethernet Adapter
* Wifi router is set to Access Point Mode
* UTP Cables
* 330 ohms resistors(optional)
* 10K ohms resistors

### Diagram

![Figure 1. Raspberry Pi Wifi Vendo](/files/DsbOkQZhaxgQO7aYtt3L)

### Configure pikonek to use the coin acceptor

To configure pikonek to use the coin acceptor, follow these steps:

#### GPIO Settings

1. Set your coin acceptor to **NO**(Normally open) and **FAST** setting.
2. Go to **Services** > **Coin** **Slot** > **Coin** **Slot** **GPIO** **Settings**.
3. Provide the input PIN which is the coin(white wire). Note: Please use GPIO.BCM for mapping GPIO PIN. Please see the BCM reference image.
4. In the diagram above the input pin(coin) is set to **GPIO 2**.

   For coin pins, the following are supported. Please use **GPIO:**\
   **GPIO 2, 3.**
5. Check the **Enable Coin Slot Relay**. Coin Slot Relay is used to prevent users from crediting coins if they forget to click the Insert Coin button. Note: This is optional.
6. Provide the GPIO output PIN. In the diagram above the output pin is set to **GPIO 17**. GPIO that are working for this is the following:\
    **GPIO 22, 17.**
7. Set the **Relay Active** to **HIGH**.
8. Hit **Apply** **changes**.

**GPIO Reference**

<figure><img src="/files/ow6cfgaI7FCwJOI2caTG" alt=""><figcaption></figcaption></figure>

#### Coin / Relay Mapping

<figure><img src="/files/4THMEFCZeHhhhiuu8Qge" alt=""><figcaption></figcaption></figure>

#### Coin Settings

1. Under **Coin** **Settings**, click the Add button.
2. To add a new coin, provide the following fields:

   1. **Currency** - Input your currency
   2. **Pulse** - Number of pulses for this currency
   3. **Time** - Equivalent time for this currency(1 minute or 1 hour)
   4. **Unit** - Specify the unit

#### Captive Portal Settings

1. Go to **Services** > **Captive** **Portal** > **General**
2. Under **Authentication**, check **Coinslot** to enable inserting a coin to authenticate to the internet.
3. Hit **Save**.


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