T-SIM / T-A Standard Series Version:With GPS you may purchase commercially available

you may purchase commercially available solar charging panels to add the functionality

MCU ESP32-S3-R8 Flash 16MB PSRAM 8MB Programming platform Arduino-IDE

you can print it yourself

Micropython Flash 16MB PSRAM 8MB Battery ADC PIN IO04 Onboard functions  Trackball

and a SA868 Wireless Transceiver

T-SIM / T-A Standard Series Version:With GPS you may purchase commercially availableStandard Series Product List Model Cellular Module Deep Sleep Current T A7670X S3* A7670X 314A T SIM7670G S3* SIM7670G 147A T SIM7000G S3* SIM7000G 166A T SIM7080G S3* SIM7080G 128A T SIM7600G S3* SIM7600G H R2 128A *: Standard Model Comparison Click here [GitHub] to see a comparison of more models. Product Module QWIIC Seamless power switching GNSS routing to SOC GNSS PPS eSIM Pad BMS Camera Interface DeepSleep Current Pin compatible T A7670X ESP32