Meshtastic - Heltec T114 V2 With GPS And CardKB
Print Profile(1)
Bill of Materials
- Ball plunger (5mm x 6) x 2: https://nl.aliexpress.com/item/32959001335.html?spm=a2g0o.order_list.order_list_main.38.50cf79d2YE055P&gatewayAdapt=glo2nld
- M2 x 8 screw x 8: https://nl.aliexpress.com/item/1005004531602992.html?spm=a2g0o.order_list.order_list_main.106.50cf79d2YE055P&gatewayAdapt=glo2nld
- 20 AWG silicone wire x 1: https://nl.aliexpress.com/item/1005005888991575.html?spm=a2g0o.order_list.order_list_main.129.50cf79d2YE055P&gatewayAdapt=glo2nld
- 28 AWG silicone wire x 1: https://nl.aliexpress.com/item/1005005888991575.html?spm=a2g0o.order_list.order_list_main.129.50cf79d2YE055P&gatewayAdapt=glo2nld
- M3 Locknut x 1: https://nl.aliexpress.com/item/32798773566.html?spm=a2g0o.order_list.order_list_main.58.50cf79d2YE055P&gatewayAdapt=glo2nld
- CardKB keyboard x 1: https://nl.aliexpress.com/item/1005007292040933.html?spm=a2g0o.order_list.order_list_main.171.50cf79d2YE055P&gatewayAdapt=glo2nld
- 3 cell battery tray (parallel) x 1: https://nl.aliexpress.com/item/1005006565882544.html?spm=a2g0o.order_list.order_list_main.216.50cf79d2YE055P&gatewayAdapt=glo2nld
- Powerbank Module (22.5w) x 1: https://nl.aliexpress.com/item/1005010113999851.html?spm=a2g0o.order_list.order_list_main.271.50cf79d2YE055P&gatewayAdapt=glo2nld
- M3 x 16 Countersunk screw x 1: https://nl.aliexpress.com/item/1005008828481165.html?spm=a2g0o.order_list.order_list_main.52.3f7879d2hnaavK&gatewayAdapt=glo2nld
- M2 Hotmelt inserts x 8: https://nl.aliexpress.com/item/1005006472641726.html?spm=a2g0o.order_list.order_list_main.339.50cf79d2YE055P&gatewayAdapt=glo2nld
- Foldable anthenna x 1: https://nl.aliexpress.com/item/1005007964395430.html?spm=a2g0o.order_list.order_list_main.88.3f7879d2hnaavK&gatewayAdapt=glo2nld
- IPEX to SMA (5cm) x 1: https://nl.aliexpress.com/item/1005009270045616.html?spm=a2g0o.order_list.order_list_main.395.50cf79d2YE055P&gatewayAdapt=glo2nld
- Heltec GPS x 1: https://nl.aliexpress.com/item/1005010476891635.html?spm=a2g0o.order_list.order_list_main.108.3f7879d2hnaavK&gatewayAdapt=glo2nld
- Heltec T114 (without screen) x 1: https://nl.aliexpress.com/item/1005008926211741.html?spm=a2g0o.order_list.order_list_main.113.3f7879d2hnaavK&gatewayAdapt=glo2nld
- SSD1309 Screen (IC2 version) x 1: https://nl.aliexpress.com/item/4000002579405.html?spm=a2g0o.order_list.order_list_main.138.3f7879d2hnaavK&gatewayAdapt=glo2nld
Description
Fully standalone Meshtastic/MeshCore radio based on the Heltec T114 V2. It features a built-in GPS module, CardKB keyboard, powerbank module with 22.5W fast charging, and is powered by three 18650 batteries.
This project is based on the components listed in the BOM.
Wiring diagram:
Battery tray + → Powerbank module +
Battery tray - → Powerbank module -
Powerbank module + → Heltec PCB +
Powerbank module - → Heltec PCB -
CardKB SDA → SSD1309 SDA
CardKB SCL → SSD1309 SCL
SSD1309 SDA → Heltec PCB Pin 0.16
SSD1309 SCL → Heltec PCB Pin 0.13
CardKB + → Heltec PCB 3V3
CardKB - → Heltec PCB GND
Connecting the CardKB directly to 3V3 can drain the battery. This can be improved by using a transistor to switch the keyboard on only when needed, for example when the screen is on.
This project can be complex. I have included some assembly photos below. If you have any questions, feel free to ask.
License
You shall not share, sub-license, sell, rent, host, transfer, or distribute in any way the digital or 3D printed versions of this object, nor any other derivative work of this object in its digital or physical format (including - but not limited to - remixes of this object, and hosting on other digital platforms). The objects may not be used without permission in any way whatsoever in which you charge money, or collect fees.
Comment & Rating (4)