Lup Yuen Lee 李立源 @lupyuen@qoto.org

nRF Connect has a nifty Modem Library for handling AT Commands ... We might port this to Apache #NuttX RTOS

Article: https://lupyuen.github.io/articles/lte2?9#at-modem-api

Prune Wholemeal (Non-Sour) Sourdough

Recipe: https://gist.github.com/lupyuen/3272756eb8b93ebbcf23b92e13f3bfa9

Beware of dropped characters ... When handling AT Commands on #PinePhone

Article: https://lupyuen.github.io/articles/lte2?9#at-modem-api

Will #Smalltalk VM compile for Apache #NuttX RTOS? 🤔

Source: https://github.com/OpenSmalltalk/opensmalltalk-vm

Handling AT Commands on #PinePhone can get tricky

Article: https://lupyuen.github.io/articles/lte2?9#at-modem-api

How we enable Multiple UART Ports on Apache #NuttX RTOS

Article: https://lupyuen.github.io/articles/serial?88#uart-in-action

To make a Voice Call on #PinePhone ... We connect to PCM Digital Audio

Article: https://lupyuen.github.io/articles/lte2?11#appendix-pcm-digital-audio

Apache #NuttX RTOS on #PinePhone now supports Multiple UART Ports 🎉 ... Up Next: NuttX Driver for LTE Modem

Source: https://github.com/apache/nuttx/pull/9243

Remember to update the #NuttX defconfig files when we modify Kconfig! ... I bake sourdough while waiting for the Pull Request Workflow to complete 😂

Article: https://lupyuen.github.io/articles/pr?88#notes

How we receive Phone Calls and SMS on #PinePhone

Article: https://lupyuen.github.io/articles/lte2?10#appendix-receive-phone-call-and-sms

#PinePhone as Feature Phone with Apache #NuttX RTOS ... How will it look? 🤔

https://lupyuen.github.io/articles/usb2#pinephone--nuttx--feature-phone

PDU Mode is more precise than Text Mode ... For sending SMS on #PinePhone

Article: https://lupyuen.github.io/articles/lte2?8#sms-text-mode-vs-pdu-mode

Sourdough Sandwich

#PinePhone SMS Messages are encoded in Unicode UTF-16

Article: https://lupyuen.github.io/articles/lte2?15#appendix-sms-pdu-message-encoding

PDU Encoding for #PinePhone SMS ... According to ETSI GSM 03.40

Article: https://lupyuen.github.io/articles/lte2?12#appendix-sms-pdu-format

Sending #PinePhone SMS in PDU Mode looks complicated ... But it's more precise than Text Mode

Article: https://lupyuen.github.io/articles/lte2?7#send-sms-in-pdu-mode

Sending an SMS (in Text Mode) on #PinePhone

Article: https://lupyuen.github.io/articles/lte2?6#send-sms-in-text-mode

2 quirky SIM Cards on #PinePhone ... Might be caused by 4G LTE IMS (IP Multimedia Subsystem) 🤔

Article: https://lupyuen.github.io/articles/lte2?88#appendix-troubleshoot-lte-ip-multimedia-subsystem

Let's make a Phone Call on #PinePhone ... With Apache #NuttX RTOS

Article: https://lupyuen.github.io/articles/lte2?5#outgoing-phone-call

Found the missing manual for #PinePhone "AT+QCFG" Commands ... Good for LTE IMS troubleshooting 🤔

Source: https://github.com/lupyuen/lupyuen.github.io/blob/master/images/Quectel_EC2x&EG2x&EG9x&EM05_Series_QCFG_AT_Commands_Manual_V1.0.pdf