I also am having no luck. I created an overlay: root@beaglebone:~# cat w1-p9-13.dts /dts-v1/; /plugin/;
/ { compatible = "ti,beaglebone", "ti,beaglebone-black", "ti,beaglebone-green"; part-number = "BB-W1"; version = "00A0"; /* state the resources this cape uses */ exclusive-use = /* the pin header uses */ "P9.13", /* the hardware IP uses */ "gpio0_31"; fragment@0 { target = <&am33xx_pinmux>; __overlay__ { dallas_w1_pins: pinmux_dallas_w1_pins { pinctrl-single,pins = < 0x74 0x37 >; }; }; }; fragment@1 { target = <&ocp>; __overlay__ { onewire@0 { compatible = "w1-gpio"; pinctrl-names = "default"; pinctrl-0 = <&dallas_w1_pins>; status = "okay"; gpios = <&gpio1 31 0>; }; }; }; }; Compiled and then copied it to /lib/firmware as BB-W1-P9-13-00A0.dtbo. Did echo BB-W1-P9-13 > /sys/devices/platform/bone_capemgr/slots. root@beaglebone:~# cat /sys/devices/platform/bone_capemgr/slots 0: PF---- -1 1: PF---- -1 2: PF---- -1 3: PF---- -1 4: P-O-L- 0 Override Board Name,00A0,Override Manuf,BB-W1-P9-13 tail of dmesg shows: [ 221.082070] bone_capemgr bone_capemgr: slot #6: 'Override Board Name,00A0,Override Manuf,BB-W1-P9-13' [ 221.108759] bone_capemgr bone_capemgr: slot #6: dtbo 'BB-W1-P9-13-00A0.dtbo' loaded; overlay id #0 [ 223.111781] w1_master_driver w1_bus_master1: w1_search: max_slave_count 64 reached, will continue next search. There is no activity on the oscilloscope for that pin. root@beaglebone:~# ls /sys/devices/w1_bus_master1/ 00-400000000000 w1_master_add w1_master_remove 00-800000000000 w1_master_attempts w1_master_search driver w1_master_max_slave_count w1_master_slave_count power w1_master_name w1_master_slaves subsystem w1_master_pointer w1_master_timeout uevent w1_master_pullup w1_master_timeout_us Have tried other overlays on different pins. No luck. The sensor is good, since I checked it out on a WiPy V2.0 board. Am frustrated by this. Board info: root@beaglebone:~# uname -a Linux beaglebone 4.4.29-bone-rt-r14 #1 PREEMPT RT Tue Nov 1 21:30:09 UTC 2016 armv7l GNU/Linux On Wednesday, November 30, 2016 at 8:58:19 PM UTC-7, Sebastián Sáez wrote: > > Hi! > > I'm trying to read temp with a ds18b20 sensor. I try with a few tutorial > without luck. > > Any tips for read this sensor? > I'm using Debian 8.6 2016-11-06 4GB SD SeeedStudio IoT (kernel > 4.4.30-ti-r64) > > > regards, > Sebastián > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/9cea473e-5f02-46f9-aee2-3a77e04eb417%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.