#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

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

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

https://lupyuen.github.io/articles/lte

@lupyuen ehwww spyware with backdoor

@lupyuen @PINE64 freedom?