I2C Test Failure

marce
New Member

Posts: 3

I2C Test Failure Mar 9, 2020 19:46:17 GMT -8

Quote

Post by marce on Mar 9, 2020 19:46:17 GMT -8

First post ever. I've been fine-tuning my SkyWeather. It's been operating pretty well for a couple weeks, and then last night it stopped reporting to weatherstem.

After a little debugging it appears that the I2C stopped working -- but I'm not sure how to debug this. Any ideas what I could look for? I'll start with unplugging/plugging everything back in, and eagerly await a response. Thanks!

pi@SwitchDocLabs:~/SDL_Pi_SkyWeather $ python testSDL_Pi_TCA9545.py

Test SDL_Pi_TCA9545 Version 1.0 - SwitchDoc Labs

Sample uses 0x73
Program Started at:2020-03-09 20:35:30

-----------BUS 0-------------------
tca9545 control register B3-B0 = 0x0
ignore Interrupts if INT3' - INT0' not connected
tca9545 control register Interrupts = 0x0
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f
10: 10 11 12 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f
20: 20 21 22 23 24 25 26 27 28 29 2a 2b 2c 2d 2e 2f
30: 30 31 32 33 34 35 36 37 38 39 3a 3b 3c 3d 3e 3f
40: 40 41 42 43 44 45 46 47 48 49 4a 4b 4c 4d 4e 4f
50: 50 51 52 53 54 55 56 57 58 59 5a 5b 5c 5d 5e 5f
60: 60 61 62 63 64 65 66 67 68 69 6a 6b 6c 6d 6e 6f
70: 70 71 72 73 74 75 76 77

-----------------------------------

-----------BUS 1-------------------
tca9545 control register B3-B0 = 0x0
ignore Interrupts if INT3' - INT0' not connected
tca9545 control register Interrupts = 0x0
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f
10: 10 11 12 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f
20: 20 21 22 23 24 25 26 27 28 29 2a 2b 2c 2d 2e 2f
30: 30 31 32 33 34 35 36 37 38 39 3a 3b 3c 3d 3e 3f
40: 40 41 42 43 44 45 46 47 48 49 4a 4b 4c 4d 4e 4f
50: 50 51 52 53 54 55 56 57 58 59 5a 5b 5c 5d 5e 5f
60: 60 61 62 63 64 65 66 67 68 69 6a 6b 6c 6d 6e 6f
70: 70 71 72 73 74 75 76 77

-----------------------------------

-----------BUS 2-------------------
tca9545 control register B3-B0 = 0x0
ignore Interrupts if INT3' - INT0' not connected
tca9545 control register Interrupts = 0x0
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f
10: 10 11 12 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f
20: 20 21 22 23 24 25 26 27 28 29 2a 2b 2c 2d 2e 2f
30: 30 31 32 33 34 35 36 37 38 39 3a 3b 3c 3d 3e 3f
40: 40 41 42 43 44 45 46 47 48 49 4a 4b 4c 4d 4e 4f
50: 50 51 52 53 54 55 56 57 58 59 5a 5b 5c 5d 5e 5f
60: 60 61 62 63 64 65 66 67 68 69 6a 6b 6c 6d 6e 6f
70: 70 71 72 73 74 75 76 77

-----------------------------------

-----------BUS 3-------------------
tca9545 control register B3-B0 = 0x0
ignore Interrupts if INT3' - INT0' not connected
tca9545 control register Interrupts = 0x0
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f
10: 10 11 12 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f
20: 20 21 22 23 24 25 26 27 28 29 2a 2b 2c 2d 2e 2f
30: 30 31 32 33 34 35 36 37 38 39 3a 3b 3c 3d 3e 3f
40: 40 41 42 43 44 45 46 47 48 49 4a 4b 4c 4d 4e 4f
50: 50 51 52 53 54 55 56 57 58 59 5a 5b 5c 5d 5e 5f
60: 60 61 62 63 64 65 66 67 68 69 6a 6b 6c 6d 6e 6f
70: 70 71 72 73 74 75 76 77

SDL Global Moderator Posts: 5,655 Raspberry Pi: Yes Other Device: PC, arduino, beagleBone	I2C Test Failure Mar 10, 2020 16:04:34 GMT -8 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by SDL on Mar 10, 2020 16:04:34 GMT -8 Wow! Is that a sick I2C interface! Try unplugging the I2C devices one by one from the Pi2Grover board to figure out which device is killing the bus. BP

marce
New Member

Posts: 3

I2C Test Failure Mar 10, 2020 17:54:53 GMT -8

Quote

Post by marce on Mar 10, 2020 17:54:53 GMT -8

Thanks for getting back to me, BP.

Well..long story short. It's working again. I had it sitting all day, when I came home from my day job, I plugged it in, and reran the TCA9545 test and viola!

While I have you here, BP -- Is it possible to run a FAN off of a PowerSave? (Let's just say I tried it -- and it worked, and maybe that is the reason I had the issue with the I2C? I was having problems with high temperature readings with the AM2315 (outside) probe -- so I moved it to the back of my box (in the shade), drilled a hole in the back, and ran a fan (blowing into the box). It worked for the better part of a day. (I realize I should have used a PowerDrive (not Save) -- I had the IN connected to one of the unused I2C Buses. Was this a bad thing to do?

This is the fan I'm powering (similar to the one recommended in your instructions):
www.amazon.com/gp/product/B07KRX9F99/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

pi@SwitchDocLabs:~/SDL_Pi_SkyWeather $ sudo python testSDL_Pi_TCA9545.py

Test SDL_Pi_TCA9545 Version 1.0 - SwitchDoc Labs

Sample uses 0x73
Program Started at:2020-03-10 18:17:53

-----------BUS 0-------------------
tca9545 control register B3-B0 = 0x1
ignore Interrupts if INT3' - INT0' not connected
tca9545 control register Interrupts = 0x0
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- 48 -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- 73 -- -- -- 77

-----------------------------------

-----------BUS 1-------------------
tca9545 control register B3-B0 = 0x2
ignore Interrupts if INT3' - INT0' not connected
tca9545 control register Interrupts = 0x0
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- 73 -- -- -- --

-----------------------------------

-----------BUS 2-------------------
tca9545 control register B3-B0 = 0x4
ignore Interrupts if INT3' - INT0' not connected
tca9545 control register Interrupts = 0x0
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- 73 -- -- -- --

-----------------------------------

-----------BUS 3-------------------
tca9545 control register B3-B0 = 0x8
ignore Interrupts if INT3' - INT0' not connected
tca9545 control register Interrupts = 0x0
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- 29 -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- 73 -- -- -- --

-----------------------------------

Last Edit: Mar 10, 2020 18:04:21 GMT -8 by marce

SDL
Global Moderator

Posts: 5,655
Raspberry Pi: Yes
Other Device: PC, arduino, beagleBone

I2C Test Failure Mar 11, 2020 17:43:41 GMT -8

Quote

Post by SDL on Mar 11, 2020 17:43:41 GMT -8

Boy, lots of stuff going on. Not sure about using a Grove Power Save to drive a fan. Lots of current going through the design and it's not designed for that.. Definitely use a Grove power SAVE to do that.

I think that maybe your fan hosed the I2C mux chip and it fixed itself with a reboot. Again, not sure.

BP

marce
New Member

Posts: 3

I2C Test Failure Mar 12, 2020 4:38:06 GMT -8

Quote

Post by marce on Mar 12, 2020 4:38:06 GMT -8

The reason I used the PowerSave for the fan, is that I had a spare one to play with -- (I had one fail early on in my building of the SkyWeather, so I ordered 2..just in case).

Going to order a Grove Power Drive to drive the fan in the future.

Thanks, much.

BTW - I'm having fun with the SkyWeather kit and wish I had more time to devote to getting it deployed. I've been tinkering with it for what seems like a couple months now. I really like the WeatherStem timelapse videos!

Thanks for putting out a cool product and providing excellent support!

SDL Global Moderator Posts: 5,655 Raspberry Pi: Yes Other Device: PC, arduino, beagleBone	I2C Test Failure Mar 12, 2020 16:06:42 GMT -8 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by SDL on Mar 12, 2020 16:06:42 GMT -8 Marce, Thank you for the nice words! Great to hear that from a customer! BP

Post by marce on Mar 9, 2020 19:46:17 GMT -8

Post by SDL on Mar 10, 2020 16:04:34 GMT -8

Post by marce on Mar 10, 2020 17:54:53 GMT -8

Post by SDL on Mar 11, 2020 17:43:41 GMT -8

Post by marce on Mar 12, 2020 4:38:06 GMT -8

Post by SDL on Mar 12, 2020 16:06:42 GMT -8

Quick Reply