i had try to connect module sim900a mini v3.8.2 to raspberry pi zero w v1.1
this is what i did ********
- Start raspi-config:
sudo raspi-config
. - Select option 3 - Interface Options.
- Select option P6 - Serial Port.
- At the prompt
Would you like a login shell to be accessible over serial?
answer 'No' - At the prompt
Would you like the serial port hardware to be enabled?
answer 'Yes
and in /boot/config.txt ***********
dtoverlay=pi3-disable-bt
dtparam=spi=on
dtparam=i2c_arm=on
#dtoverlay=w1-gpio
enable_uart=1
core_freq=250
and i set in /boot/cmdline.txt ************
console=tty1 root=PARTUUID=36517a7a-02 rootfstype=ext4 fsck.repair=yes rootwait modules-load=dwc2,g_ether quiet splash plymouth.ignore-serial-consoles earlycon=pl011,mmio32,0x20201000 core_freq=250
also try to set console=tty1 root=PARTUUID=36517a7a-02 rootfstype=ext4 fsck.repair=yes rootwait modules-load=dwc2,g_ether quiet splash plymouth.ignore-serial-consoles
so in node red i use serialport /dev/ttyS0 baud rate 9600 data bits 8 parity none stop bits 1
so is there any thing i did wrong ? please ?
note : i alredy test the sim900a with arduino and it work