Based on the DIY ESP32 GPS design from Jan Heijnen a simple flat design with and without strap options.

Printed in PETG with 100% fill in 6 perimeters and used wih tree supports in Orca slicer.

Parts used:

1 x Lilygo T5 2.13 inch in B74 version [Q300}

https://www.lilygo.cc/products/t5-v2-3-1?variant=42366871699637

1 x 16 GB micro SD card

1 x 1s 1200 mah Lipo battery

https://www.aliexpress.com/item/4001066570571.html?spm=a2g0o.order_list.order_list_main.57.67861802jlLU2V

1 x QI wireless charger board black

https://www.aliexpress.com/item/1005006104986689.html?spm=a2g0o.order_list.order_list_main.52.67861802jlLU2V

1 x QI wireless charger USB-C and USB-A

https://www.aliexpress.com/item/1005006301721368.html?spm=a2g0o.order_list.order_list_main.5.67861802jlLU2V

1 x Beitian BE220 GPS

https://www.aliexpress.com/item/1005006126007630.html?spm=a2g0o.order_list.order_list_main.27.67861802jlLU2V

1 x 6x6x4.3 mm push button

https://nl.aliexpress.com/item/1005003115135192.html?spm=a2g0o.productlist.main.9.13b854099kMwDs&algo_pvid=5d2b2a0f-e54f-4af9-82da-51fc99c77095&algo_exp_id=5d2b2a0f-e54f-4af9-82da-51fc99c77095-4&pdp_npi=4%40dis%21EUR%211.95%211.95%21%21%212.04%212.04%21%402103867617189660665395361ec9a6%2112000024181858305%21sea%21NL%21124737440%21&curPageLogUid=O2Mwrtx6BRG9&utparam-url=scene%3Asearch%7Cquery_from%3A

1 x 3mm LED RED 3-6V (charge indication)

https://www.aliexpress.com/item/1005006161303663.html?spm=a2g0o.order_list.order_list_main.41.67861802jlLU2V

1 x 3mm LED GREEN 3-6V (button press indication)

https://www.aliexpress.com/item/1005006161303663.html?spm=a2g0o.order_list.order_list_main.41.67861802jlLU2V

1 x Strong double sided adhesive Acryl tape 10 mm width

https://nl.aliexpress.com/item/1005005751052700.html?spm=a2g0o.order_list.order_list_main.106.3adb79d2t7W8wV&gatewayAdapt=glo2nld

1 x transparant PVC for coverplate 80x80x0.5mm

1 x Arm strap 50x400 mm (for strap version)

https://www.aliexpress.com/item/1005003244088631.html?spm=a2g0o.order_list.order_list_main.16.67861802jlLU2V

1 x waterproof arm case (for strapless version)

https://www.aliexpress.com/item/1005002964694555.html?spm=a2g0o.order_list.order_list_main.37.67861802jlLU2V

Complete building manual will follow August 2024