Add Periphers for Heltec with GPS Module Details (#1014)

* Create GPS Module

I will like to add more instructions for people to hook up their modules to for specific boards. This is an example of one which I tried to be as detailed as possible for newer members, this will keep the same question from being asked on the #help channel. I have another for CardKB and buzzer modules.

* Update GPS Module

I've adjusted the tone to be more i informative. Would you be able to check if the it's possible to attach the picture or should I just remove it, also not sure how the formating will look.

* Add files via upload

* Update and rename GPS Module to GPS Module.mdx

Is this what you meant by file type?

* Update and rename GPS Module.mdx to peripherals.mdx

Updated the name and also copied the same formatting as the RAK peripherals. I did add the ones that I am planning of adding as tabs such as the CardKB and Buzzer options.

* Update and rename docs/hardware/devices/heltec/ESP32V3/peripherals.mdx to docs/hardware/devices/heltec/peripherals.mdx

Updated to follow the directory of the Raspberry

* Rename Heltec ESP32 V3 gps-module.webp to HeltecESP32V3-gps-module.webp

* Update peripherals.mdx

* Update peripherals.mdx

I corrected a missing bracket for the image

* Update peripherals.mdx

* Update peripherals.mdx

Corrected the levels for the headers and removed the extra m

---------

Co-authored-by: rcarteraz <robert.l.carter2@gmail.com>
Co-authored-by: Tommy Ekstrand <tekstrand@users.noreply.github.com>

docs/hardware/devices/heltec/peripherals.mdx

@@ -0,0 +1,90 @@
+---
+id: peripherals
+title: Heltec ESP32 V3 Supported Peripherals
+sidebar_label: Peripherals
+sidebar_position: 3
+---
+
+import Tabs from "@theme/Tabs";
+import TabItem from "@theme/TabItem";
+
+<Tabs
+groupId="heltecESP32V3"
+queryString="heltecESP32V3"
+defaultValue="GPS"
+values={[
+{label: 'GPS Module', value: 'GPS'},
+{label: 'Keyboard', value: 'Keyboard'},
+{label: 'Buzzer', value: 'Buzzer'},
+]}>
+<TabItem value="GPS">
+
+## GPS Module
+
+### Introduction
+This informational guide outlines the process of enhancing the Heltec ESP32 V3 board by integrating the GT-U7 GPS Module. The addition of this module provides precise GPS capabilities and a real-time clock (RTC), eliminating the need for WiFi or a smartphone for time tracking. This enhancement is particularly beneficial for the mesh, where tracking the duration since the last seen device is crucial.
+However, it's important to note that the GPS module increases the power demand of your node. We'll address this by detailing how to incorporate a switch or an NPN 2N2222 transistor into your setup. This enables firmware-controlled power management, conserving battery life without sacrificing functionality.
+
+It is important to note that the GPS module increases the power demand of the node. This guide details the incorporation of a switch or an NPN 2N2222 transistor to enable firmware-controlled power management, conserving battery life without compromising functionality.
+
+### Benefits
+- **GPS Capabilities**: Provides the node with the ability to determine its location with high precision, which is invaluable for tracking, mapping, and various other applications requiring location data.
+- **Real-Time Clock (RTC)**: Ensures accurate timekeeping on the mesh network without relying on external time sources such as the internet or a connected smartphone.
+
+### Power Consumption Considerations
+The GT-U7 module is known for its high power consumption, which can potentially shorten the battery lifespan of the node. To mitigate this, two approaches are recommended:
+ - **Manual Switch**: A simple on/off switch for the GPS module, allowing for manual power management.
+ - **NPN 2N2222 Transistor**: Facilitates automatic power control through the firmware, enabling the device to turn off the GPS module based on specific conditions or after a set period.
+
+### Materials Needed
+ - Heltec ESP32 V3 board
+ - GT-U7 GPS Module
+ - NPN 2N2222 Transistor
+ - Wires and soldering equipment
+ - (Optional) Switch for manual power control
+
+### Instructions
+
+ 1. Solder a cable from the TXD slot on the GPS module to GPIO 48 on Heltec board. (You may choose your own GPIO pin)
+ 2. Solder a cable from the RXD slot on the GPS module to GPIO 47 on Heltec board. (You may choose your own GPIO pin)
+ 3. Solder a cable from the GND slot on the GPS module to GND pin on Heltec board.
+ 4. Solder a cable from left leg of NPN 2N2222 Transistor to VCC skit on GPS module.
+ 5. Solder a cable from Right leg of NPN 2N2222 Transistor to 3V/5V pin on Heltec board.
+ 6. Solder a cable from Middle leg of NPN 2N2222 Transistor to GPIO 48 of Heltec board. (You may choose your own GPIO pin)
+ 7. Go to Meshtastic app > Radio Configurations > Position
+ 8. Set GPS_RX_PIN to 48 (This will communicate to the TXD slot on the GPS)
+ 9. Set GPS_TX_PIN to 47 (This will communicate to the RXD slot on the GPS)
+ 10. Set PIN_GPS_EN to 46 (This will allow the meshtastic firmware to turn off the power on the GPS board with the user button of the Heltec Board by pressing it 3 times)
+
+### Wiring Diagram
+
+![HeltecESP32V3-gps-module](</img/hardware/HeltecESP32V3-gps-module.webp>)
+
+### Troubleshooting Tips
+
+If the GPS module does not power on, check the connections to the transistor and ensure that the middle pin is properly configured in the firmware settings.
+If the message "GPS is Disabled" appears, press the user button on the Heltec board three times to enable it.
+If the message "No GPS Present" appears, check that the TXD and RXD are correctly configured.
+If the message "No GPS Lock" appears, move the node to another location with access to the sky for a bit to lock on properly.
+If the location is not accurate, walk around to allow the GPS to properly lock on.
+
+### Conclusion
+
+By following this guide, you can enhance your Heltec ESP32 V3 board with valuable GPS capabilities and an RTC, while effectively managing power consumption. Whether for a hobby project or a more serious application, these additions significantly expand the potential of your device.
+
+</TabItem>
+<TabItem value="Keyboard">
+
+## Keyboard
+
+Comming Soon
+
+</TabItem>
+<TabItem value="Buzzer">
+
+## Buzzer
+
+Commming Soon
+</TabItem>
+</Tabs>
+