Debugging the RS485/Raspi [Scratchbook]

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G====== Debugging the RS485/Raspi ====== {{::img_20161124_100617.jpg?nolink&800|}} * LED is glowing, "flashing" (getting dark shortly) every second, as the weather station sends data every second {{:img_20161124_100600.jpg?nolink&800|}} * We've connected the logic analyzer after the sferalabs board. Data comes in, all fine. {{::logic-analyzer.png?direct&1200|}} ...and can be decoded. ===== However, ===== When I connect to it, it shows no data. <code>screen /dev/ttyAMA0 19200</code> //(baud rate taken from the data sheet)// Bluetooth is disabled: <code> $ cat /etc/modprobe.d/raspi-blacklist.conf blacklist btbcm blacklist hci_uart </code> Raspberry Pi, model 3 B <code> uname -a Linux raspberrypi 4.4.9-v7+ #884 SMP Fri May 6 17:28:59 BST 2016 armv7l GNU/Linux </code> Weather station is the basic Elsner P03 without modbus. ===== Update 24. Nov 16, 14:15 ===== > Can you please add this to /boot/config.txt > <code>dtoverlay=pi3-disable-bt</code> > Also, from the command line: > <code>sudo systemctl disable hciuart</code> > then reboot and try again? Didn't work. Yet. I stumbled upon this: <code> $ cat /boot/config.txt enable_uart=0 </code> Setting this to enable_uart=1 did the trick. {{::p03-rs485.gif?nolink|}} WOOHOO! \O/

sfera.1479993586.txt · Last modified: 2016/11/24 14:19 by claude

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