Inside #PinePhone is the Quectel EG25-G 4G LTE Modem ... Let's talk about the modem in this article
#PinePhone's 4G LTE Modem accepts AT Commands ... Over UART (slower) and USB (faster)
Article: https://lupyuen.github.io/articles/lte?2#quectel-eg25-g-lte-modem
#PinePhone's 4G LTE Modem has UART, USB and PCM interfaces ... For 4G Mobile Data and Digital Audio
Article: https://lupyuen.github.io/articles/lte?3#data-interfaces-for-lte-modem
#PinePhone controls its 4G LTE Modem ... With these GPIO Pins
Article: https://lupyuen.github.io/articles/lte?4#control-pins-for-lte-modem
#PinePhone's 4G LTE Modem is powered by these pins
Article: https://lupyuen.github.io/articles/lte?5#lte-modem-power
Soft Switch for powering up #PinePhone's 4G LTE Modem, Nokia-style
Article: https://lupyuen.github.io/articles/lte?5#lte-modem-power
#PinePhone's 4G LTE Modem outputs 1.8 Volts ... Because some SIM Cards run on 1.8 Volts
Article: https://lupyuen.github.io/articles/lte?5#power-output
#PinePhone's 4G LTE Modem has more pins than a Bowling Alley! (Almost) ... Here's how they power up the modem
Article: https://lupyuen.github.io/articles/lte?6#power-on-lte-modem
Let's check if Apache #NuttX RTOS has powered up #PinePhone's 4G LTE Modem
Article: https://lupyuen.github.io/articles/lte?8#is-lte-modem-up
We can't read the Status reliably from #PinePhone's 4G LTE Modem ... Let's check the UART instead
Article: https://lupyuen.github.io/articles/lte?8#is-lte-modem-up
Talking to #PinePhone's 4G LTE Modem over UART ... With Apache #NuttX RTOS
Article: https://lupyuen.github.io/articles/lte?9#test-uart-with-nuttx
Testing #PinePhone's 4G LTE Modem over USB ... With Apache #NuttX RTOS
Article: https://lupyuen.github.io/articles/lte?10#test-usb-with-nuttx
All about the Quectel EG25-G 4G LTE Modem inside #PinePhone @PINE64 ... And how we'll control it with Apache #NuttX RTOS
Here's how we power up #PinePhone's 4G LTE Modem ... With Apache #NuttX RTOS
Article: https://lupyuen.github.io/articles/lte?7#power-up-wth-nuttx