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smstools3's /var/log/smsd.log keeps giving:

GSM1: Checking if modem is ready
GSM1: -> AT
GSM1: Command is sent, waiting for the answer. (5)
GSM1: No answer, put_command expected (OK)|(ERROR)|(0)|(4), timeout occurred. 1.

My /etc/smsd.conf:

# Example smsd.conf. Read the manual for a description

devices = GSM1
logfile = /var/log/smsd.log
loglevel = 7

[GSM1]
device = /dev/ttyAMA0
incoming = no
#pin = 1111

My /boot/config.txt contains:

[GSM modem on GPIO 14/15]
enable_uart=1
dtoverlay=miniuart-bt

What is causing this? I've tried a few different wiring configurations, and I still get the same error: wiring #1

and the simpler

wiring #2

(mutatis muntandis)

Improve this question
8
  • This question is lacking detail and any diagnostics. If it really is RS232 connecting to a Pi serial port won't work. Why would you nobble the Pi Bluetooth - this just an unnecessary complication and the default would be orders of magnitude faster than GSM.
    – Milliways
    Commented Jan 5 at 2:29
  • 1
    @Milliways "lacking detail and any diagnostics" What detail would help the post? "If it really is RS232 connecting to a Pi serial port won't work." What do I connect it to, then? "Why would you nobble the Pi Bluetooth" I saw somewhere in the documentation that is necessary, because Bluetooth uses the those same pins.
    – Geremia
    Commented Jan 5 at 2:56
  • 1
    @Milliways "the default would be orders of magnitude faster than GSM." What's the default? Aren't I supposed to be using GSM with a GSM modem?
    – Geremia
    Commented Jan 5 at 3:08
  • Why would you believe what you "saw somewhere" rather than the official documentation raspberrypi.com/documentation/computers/… or the numerous posts on this site.
    – Milliways
    Commented Jan 5 at 3:09
  • @Milliways I saw it on some RaspberryPi.com documentation page.
    – Geremia
    Commented Jan 5 at 3:17

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