NRF-TXT - Standalone Meshtastic communicator (Heltec T114 V2)

For those who want to just buy one ready to go here's my stores. Link bellow. 

<<Harutech Shop Here>>    Buy Full Assembled here

<<Etsy Shop Here>>
<<Tindie Shop Here>>

This is a case designed to build a standalone Meshtastic communicator using the Heltec Mesh Node T114 and the M5Stack CardKb. The goal of this project was to create a compact, easy-to-print design that remains functional and durable. It also supports additional features like GPS, a buzzer, and an environmental temperature sensor. Additionally, it accommodates folding antennas that can be tucked in for improved portability and compactness.
 

List of Materials:

• Heltec Mesh Node T114 + Screen - $36.90

  https://muzi.works/products/heltec-mesh-node-t114

• Heltec GPS Module - $12.90

  https://muzi.works/products/heltec-gps-module-for-mesh-node-t114

• M5Stack CardKB - $7.95
  https://www.digikey.com/short/v8wjcvb3

• Build Kit(Silicone Cover, buzzer, antenna, PLA case, Screws, nuts) - $40-50
  https://www.etsy.com/listing/4361726783/nrf-txt-case-kit

• 4000mAh Li-Ion battery 125054(12x50x54mm) - $9.99 - $11
  https://a.co/d/iMcOw71
  https://harutech.org/products/4000mah-battery

• 5000mAh Li-Ion battery 115252(11x52x52mm) - $13
  https://harutech.org/products/5000mah-battery
   

Option if you need it Separately for those building multiple in bulk:

• Silicone Cover - $14.50
  https://harutech.org/products/cardkb-silicone-cover
  https://harukitoreda.etsy.com/listing/1772533422/cardkb-silicone-cover

• NRF-TXT Buzzer $9.99 ($3.33 X 3)
  https://harutech.org/products/nrf-txt-t114-buzzer
  https://www.etsy.com/listing/4354451851/nrf-txt-t114-buzzer-3pc

• 3V Passive Buzzer 9042 - $2.51 (Alternate)
  https://www.aliexpress.us/item/3256806074013807.html?channel=twinner
  https://a.co/d/3LovgP7

• BME680 - $16.99
  https://a.co/d/hAfowoO

• Adafruit TDK InvenSense ICM-20948 9-DoF IMU - $19.95
  https://www.adafruit.com/product/4554
  https://www.digikey.com/short/hp7wmbtt

• 868MHz - 915MHz 3dbi Folding Antenna - $11.89 ($2.37 X 5) (Not required, fits any size antenna)
  https://a.co/d/bmQ9hzc 

• https://www.aliexpress.us/item/2251832778598150.html

• 16mm m3 Hex Socket Head Cap screw  - 
  https://a.co/d/aFIBnWE

• 28 AWG Stranded Wire Spool - 
  https://a.co/d/4YyacXU

Printing instructions:
I designed all parts so that they do not need much support other than tree supports. They are on the position that will get you the best possible print.

CardKB Instructions:

1. Make sure to remove the Groove port connector that comes built-in to the CardKB, this is necessary to be able to cover the keyboard with the silicone cover.

2. Solder wires as follows:
   
   

   

      

BME680 Instructions:

1. The sensor must be soldered at the same time as the keyboard since both boards must be plugged to the the same SDA, SCL and Ve pins. 

2. Solder wires as follows:
   
   

   

Buzzer Instructions:

1. Solder positive side of buzzer to pin 1.01

2. Solder negative side of buzzer to GND

3. Configure External notifications to work from pin 33 for the buzzer