As in an earlier thread I am using an DS18B20 directly connected to GPIO pins of a Pi Zero with 1.5k pullup, operating at 3.3v. Owserver is version 3.1p1-6 from raspbian testing.
I have specified dtoverlay=w1-gpio,gpiopin=4 and done sudo modprobe w1-gpio pullup=1 This basically works, both when connected in parasitic and 3 wire mode but about 1 in 20 reads I get a read error (in both modes). It is operating on the bench so the bus is only a few inches long. I have started owserver in debug mode and below is what I see when there is an error (it was connected in parasitic mode when the debug was collected). If anyone can suggest what the problem may be I will be very grateful. Sep 5 13:48:03 piz002 owserver[2462]: DEBUG: ow_tcp_read.c:(63) attempt 24 bytes Time: 10.000000 seconds Sep 5 13:48:03 piz002 owserver[2462]: DEBUG: ow_tcp_read.c:(113) read: 24 - 0 = 24 Sep 5 13:48:03 piz002 owserver[2462]: DEBUG: from_client.c:(66) FromClient payload=28 size=8192 type=2 sg=0x20 offset=0 Sep 5 13:48:03 piz002 owserver[2462]: DEBUG: from_client.c:(74) FromClient (no servermessage) payload=28 size=8192 type=2 controlflags=0x20 offset=0 Sep 5 13:48:03 piz002 owserver[2462]: DEBUG: ow_tcp_read.c:(63) attempt 28 bytes Time: 10.000000 seconds Sep 5 13:48:03 piz002 owserver[2462]: DEBUG: ow_tcp_read.c:(113) read: 28 - 0 = 28 Sep 5 13:48:03 piz002 owserver[2462]: DEBUG: handler.c:(153) START handler 28.62DABD030000/temperature Sep 5 13:48:03 piz002 owserver[2462]: CALL: data.c:(103) DataHandler: parse path=28.62DABD030000/temperature Sep 5 13:48:03 piz002 owserver[2462]: DEBUG: ow_parseobject.c:(163) 28.62DABD030000/temperature Sep 5 13:48:03 piz002 owserver[2462]: CALL: ow_parsename.c:(104) path=[28.62DABD030000/temperature] Sep 5 13:48:03 piz002 owserver[2462]: DEBUG: ow_regex.c:(154) Not found Sep 5 13:48:03 piz002 owserver[2462]: DEBUG: ow_regex.c:(201) 0: 0->15 found <><28.62DABD030000><> Sep 5 13:48:03 piz002 owserver[2462]: DEBUG: ow_regex.c:(201) 1: 0->2 found <><28><.62DABD030000> Sep 5 13:48:03 piz002 owserver[2462]: DEBUG: ow_regex.c:(201) 2: 3->15 found <28.><62DABD030000><> Sep 5 13:48:03 piz002 owserver[2462]: DEBUG: ow_cache.c:(912) Looking for device 28 62 DA BD 03 00 00 B8 Sep 5 13:48:03 piz002 owserver[2462]: DEBUG: ow_cache.c:(1070) Search in cache sn 28 62 DA BD 03 00 00 B8 pointer=0xb6ebd618 index=0 size=4 Sep 5 13:48:03 piz002 owserver[2462]: DEBUG: ow_cache.c:(1102) Value found in cache, but expired by 0 seconds. Sep 5 13:48:03 piz002 owserver[2462]: DETAIL: ow_presence.c:(80) Checking presence of /28.62DABD030000/temperature Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_transaction.c:(379) pack=RESET END VERIFY Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_transaction.c:(254) Item cannot be bundled Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_transaction.c:(274) Ship Packets=0 Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_select.c:(70) Selecting a path (and device) path=/28.62DABD030000/temperature SN=28 62 DA BD 03 00 00 B8 last path=00 00 00 00 00 00 00 00 Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_select.c:(84) Continuing root branch Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1.c:(103) Sending w1 reset message Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1_send.c:(132) Netlink send ----------------- Sep 5 13:48:04 piz002 owserver[2462]: NLMSGHDR: len=52 type=3 (NLMSG_DONE) flags=5 seq=1|301 pid=2465 Sep 5 13:48:04 piz002 owserver[2462]: CN_MSG: idx/val=3/1 (CN_W1_IDX) seq=1|301 ack=65837 len=16 flags=0 Sep 5 13:48:04 piz002 owserver[2462]: W1_NETLINK_MSG: type=4 (W1_MASTER_CMD) len=4 id=1 Sep 5 13:48:04 piz002 owserver[2462]: W1_NETLINK_CMD: cmd=5 (W1_CMD_RESET) len=0 Sep 5 13:48:04 piz002 owserver[2462]: NULL data Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1_send.c:(143) NETLINK sent seq=301 Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1_parse.c:(229) Loop waiting for netlink piped message Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1_parse.c:(162) Pipe header: len=52 type=3 seq=1|300 pid=0 Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1_parse.c:(195) Pipe read -------------------- Sep 5 13:48:04 piz002 owserver[2462]: NLMSGHDR: len=52 type=3 (NLMSG_DONE) flags=0 seq=1|300 pid=0 Sep 5 13:48:04 piz002 owserver[2462]: CN_MSG: idx/val=3/1 (CN_W1_IDX) seq=1|300 ack=65836 len=16 flags=0 Sep 5 13:48:04 piz002 owserver[2462]: W1_NETLINK_MSG: type=4 (W1_MASTER_CMD) len=4 id=1 Sep 5 13:48:04 piz002 owserver[2462]: W1_NETLINK_CMD: cmd=4 (W1_CMD_TOUCH) len=0 Sep 5 13:48:04 piz002 owserver[2462]: NULL data Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1_parse.c:(236) Netlink sequence number out of order Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1_parse.c:(120) Pre-parse header: 16 bytes len=36 type=3 seq=0|0 pid=0 Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1_parse.c:(67) Netlink (w1) Bad message length (36) Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1_dispatch.c:(172) Dispatch loop Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1_parse.c:(112) Wait to peek at message Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1_parse.c:(120) Pre-parse header: 16 bytes len=52 type=3 seq=1|301 pid=0 Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1_parse.c:(141) Netlink read ----------------- Sep 5 13:48:04 piz002 owserver[2462]: NLMSGHDR: len=52 type=3 (NLMSG_DONE) flags=0 seq=1|301 pid=0 Sep 5 13:48:04 piz002 owserver[2462]: CN_MSG: idx/val=3/1 (CN_W1_IDX) seq=1|301 ack=65837 len=16 flags=0 Sep 5 13:48:04 piz002 owserver[2462]: W1_NETLINK_MSG: type=4 (W1_MASTER_CMD) len=4 id=1 Sep 5 13:48:04 piz002 owserver[2462]: W1_NETLINK_CMD: cmd=5 (W1_CMD_RESET) len=0 Sep 5 13:48:04 piz002 owserver[2462]: NULL data Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1_dispatch.c:(91) Netlink message directed to W1 bus master 1 Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1_dispatch.c:(148) Sending this packet to w1_bus_master1 Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1_dispatch.c:(172) Dispatch loop Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1_parse.c:(112) Wait to peek at message Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1_parse.c:(229) Loop waiting for netlink piped message Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1_parse.c:(162) Pipe header: len=52 type=3 seq=1|301 pid=0 Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1_parse.c:(195) Pipe read -------------------- Sep 5 13:48:04 piz002 owserver[2462]: NLMSGHDR: len=52 type=3 (NLMSG_DONE) flags=0 seq=1|301 pid=0 Sep 5 13:48:04 piz002 owserver[2462]: CN_MSG: idx/val=3/1 (CN_W1_IDX) seq=1|301 ack=65837 len=16 flags=0 Sep 5 13:48:04 piz002 owserver[2462]: W1_NETLINK_MSG: type=4 (W1_MASTER_CMD) len=4 id=1 Sep 5 13:48:04 piz002 owserver[2462]: W1_NETLINK_CMD: cmd=5 (W1_CMD_RESET) len=0 Sep 5 13:48:04 piz002 owserver[2462]: NULL data Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1.c:(260) Sending w1 send/receive data message for 28 62 DA BD 03 00 00 B8 Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1_send.c:(132) Netlink send ----------------- Sep 5 13:48:04 piz002 owserver[2462]: Byte buffer Data, length=25 Sep 5 13:48:04 piz002 owserver[2462]: --000: F0 DB BE 6F FB B6 7F FB FE FD DF FF EF FF B6 6D Sep 5 13:48:04 piz002 owserver[2462]: --016: DB B6 6D DB B6 6D DB FE EF Sep 5 13:48:04 piz002 owserver[2462]: <...o...........m..m..m...> Sep 5 13:48:04 piz002 owserver[2462]: NLMSGHDR: len=77 type=3 (NLMSG_DONE) flags=5 seq=1|302 pid=2465 Sep 5 13:48:04 piz002 owserver[2462]: CN_MSG: idx/val=3/1 (CN_W1_IDX) seq=1|302 ack=65838 len=41 flags=0 Sep 5 13:48:04 piz002 owserver[2462]: W1_NETLINK_MSG: type=4 (W1_MASTER_CMD) len=29 id=1 Sep 5 13:48:04 piz002 owserver[2462]: W1_NETLINK_CMD: cmd=4 (W1_CMD_TOUCH) len=25 Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1_send.c:(143) NETLINK sent seq=302 Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1_parse.c:(120) Pre-parse header: 16 bytes len=36 type=3 seq=0|0 pid=0 Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1_parse.c:(67) Netlink (w1) Bad message length (36) Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1_dispatch.c:(172) Dispatch loop Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1_parse.c:(112) Wait to peek at message Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1_parse.c:(120) Pre-parse header: 16 bytes len=77 type=3 seq=1|302 pid=0 Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1_parse.c:(141) Netlink read ----------------- Sep 5 13:48:04 piz002 owserver[2462]: Byte buffer Data, length=25 Sep 5 13:48:04 piz002 owserver[2462]: --000: F0 92 AA 4A AA A4 56 AA 5A B5 55 DB AA AD 84 6D Sep 5 13:48:04 piz002 owserver[2462]: --016: DB B6 6D DB B6 6D DB FE EF Sep 5 13:48:04 piz002 owserver[2462]: <...J..V.Z.U....m..m..m...> Sep 5 13:48:04 piz002 owserver[2462]: NLMSGHDR: len=77 type=3 (NLMSG_DONE) flags=0 seq=1|302 pid=0 Sep 5 13:48:04 piz002 owserver[2462]: CN_MSG: idx/val=3/1 (CN_W1_IDX) seq=1|302 ack=65839 len=41 flags=0 Sep 5 13:48:04 piz002 owserver[2462]: W1_NETLINK_MSG: type=4 (W1_MASTER_CMD) len=29 id=1 Sep 5 13:48:04 piz002 owserver[2462]: W1_NETLINK_CMD: cmd=4 (W1_CMD_TOUCH) len=25 Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1_dispatch.c:(91) Netlink message directed to W1 bus master 1 Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1_dispatch.c:(148) Sending this packet to w1_bus_master1 Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1_dispatch.c:(172) Dispatch loop Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1_parse.c:(112) Wait to peek at message Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1_parse.c:(229) Loop waiting for netlink piped message Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1_parse.c:(162) Pipe header: len=77 type=3 seq=1|302 pid=0 Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1_parse.c:(195) Pipe read -------------------- Sep 5 13:48:04 piz002 owserver[2462]: Byte buffer Data, length=25 Sep 5 13:48:04 piz002 owserver[2462]: --000: F0 92 AA 4A AA A4 56 AA 5A B5 55 DB AA AD 84 6D Sep 5 13:48:04 piz002 owserver[2462]: --016: DB B6 6D DB B6 6D DB FE EF Sep 5 13:48:04 piz002 owserver[2462]: <...J..V.Z.U....m..m..m...> Sep 5 13:48:04 piz002 owserver[2462]: NLMSGHDR: len=77 type=3 (NLMSG_DONE) flags=0 seq=1|302 pid=0 Sep 5 13:48:04 piz002 owserver[2462]: CN_MSG: idx/val=3/1 (CN_W1_IDX) seq=1|302 ack=65839 len=41 flags=0 Sep 5 13:48:04 piz002 owserver[2462]: W1_NETLINK_MSG: type=4 (W1_MASTER_CMD) len=29 id=1 Sep 5 13:48:04 piz002 owserver[2462]: W1_NETLINK_CMD: cmd=4 (W1_CMD_TOUCH) len=25 Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1_parse.c:(249) About to call nrs_callback Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1_parse.c:(251) Called nrs_callback Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_transaction.c:(222) verify = 1 Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_presence.c:(272) Presence of 28 62 DA BD 03 00 00 B8 NOT found on bus w1_bus_master1 Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_parsename.c:(164) Set error to 27 <Path - bad path syntax> Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_parsename.c:(63) /28.62DABD030000/temperature Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: data.c:(106) DataHandler: OWQ_create failed cm.ret=-1 Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: data.c:(207) DataHandler: cm.ret=-1 Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: to_client.c:(76) payload=0 size=0, ret=-1, sg=0x20 offset=0 Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: to_client.c:(85) No data Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: data.c:(226) Finished with client request Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: handler.c:(135) OWSERVER handler done Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_net_server.c:(259) Normal completion. Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1_parse.c:(120) Pre-parse header: 16 bytes len=52 type=3 seq=1|302 pid=0 Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1_parse.c:(141) Netlink read ----------------- Sep 5 13:48:04 piz002 owserver[2462]: NLMSGHDR: len=52 type=3 (NLMSG_DONE) flags=0 seq=1|302 pid=0 Sep 5 13:48:04 piz002 owserver[2462]: CN_MSG: idx/val=3/1 (CN_W1_IDX) seq=1|302 ack=65838 len=16 flags=0 Sep 5 13:48:04 piz002 owserver[2462]: W1_NETLINK_MSG: type=4 (W1_MASTER_CMD) len=4 id=1 Sep 5 13:48:04 piz002 owserver[2462]: W1_NETLINK_CMD: cmd=4 (W1_CMD_TOUCH) len=0 Sep 5 13:48:04 piz002 owserver[2462]: NULL data Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1_dispatch.c:(91) Netlink message directed to W1 bus master 1 Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1_dispatch.c:(148) Sending this packet to w1_bus_master1 Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1_dispatch.c:(172) Dispatch loop Sep 5 13:48:04 piz002 owserver[2462]: DEBUG: ow_w1_parse.c:(112) Wait to peek at message Cheers Colin ------------------------------------------------------------------------------ _______________________________________________ Owfs-developers mailing list Owfs-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/owfs-developers
