Trying to install Coral Enviro Board to R.Pi3B

[neilh10]

Followed the instructions, and the display reads out "nan" for actual readings.

Purchased the Coral Enviro Board from Mouser.
I'm wondering, shouldn't there be an overaly in /boot/overlays for the CoralEnviroBoard.

[Namburger]

@neilh10 I'm sorry, what's the actual issue?
There should be a /boot/overlay.txt in mendel

[neilh10]

Hello @Namburger , thankyou for getting back.
I followed https://coral.ai/docs/enviro-board/get-started/ and when it ran the display said "nan" for actual readings that is for python is Not A Number.
While I'm software engineer in uP Iot, and I have done some BeagleBOne - this is a little school project with the R.Pi and a neighbour.
So it just seems to me this is a rabbit hole - there aren't any links describing what to do, or look out for - it seems its supposed to just work, and it isn't. I checked out possible other hints of how to solve it #21 , #38

If the board isn't supported anymore I should just use one of the others that are out there PIM486

Trying to guess at some debuggin ..

pi@rpi3nhab:~ $ ls /boot/overlay.txt
ls: cannot access '/boot/overlay.txt': No such file or directory

pi@rpi3nhab:~ $ ls /boot
bcm2708-rpi-b.dtb bcm2710-rpi-cm3.dtb fixup4x.dat LICENCE.broadcom
bcm2708-rpi-b-plus.dtb bcm2711-rpi-4-b.dtb fixup_cd.dat overlays
bcm2708-rpi-b-rev1.dtb bcm2711-rpi-cm4.dtb fixup.dat start4cd.elf
bcm2708-rpi-cm.dtb bootcode.bin fixup_db.dat start4db.elf
bcm2708-rpi-zero.dtb cmdline.txt fixup_x.dat start4.elf
bcm2708-rpi-zero-w.dtb config.txt issue.txt start4x.elf
bcm2709-rpi-2-b.dtb COPYING.linux kernel7.img start_cd.elf
bcm2710-rpi-2-b.dtb fixup4cd.dat kernel7l.img start_db.elf
bcm2710-rpi-3-b.dtb fixup4.dat kernel8.img start.elf
bcm2710-rpi-3-b-plus.dtb fixup4db.dat kernel.img start_x.elf

I thought overlays are .dtbo ? ~ but can't see anything that relates to this board. Is there a way of listing the boards EEPROM to be able to verify what its requiring

rpi3nhab:~ $ ls /boot/overlays/
act-led.dtbo mcp2515-can1.dtbo
adau1977-adc.dtbo mcp3008.dtbo
adau7002-simple.dtbo mcp3202.dtbo
ads1015.dtbo mcp342x.dtbo
ads1115.dtbo media-center.dtbo
ads7846.dtbo merus-amp.dtbo
adv7282m.dtbo midi-uart0.dtbo
adv728x-m.dtbo midi-uart1.dtbo
akkordion-iqdacplus.dtbo miniuart-bt.dtbo
allo-boss-dac-pcm512x-audio.dtbo mmc.dtbo
allo-digione.dtbo mpu6050.dtbo
allo-katana-dac-audio.dtbo mz61581.dtbo
allo-piano-dac-pcm512x-audio.dtbo ov5647.dtbo
allo-piano-dac-plus-pcm512x-audio.dtbo ov7251.dtbo
anyspi.dtbo ov9281.dtbo
apds9960.dtbo overlay_map.dtb
applepi-dac.dtbo papirus.dtbo
at86rf233.dtbo pibell.dtbo
audioinjector-addons.dtbo piglow.dtbo
audioinjector-isolated-soundcard.dtbo piscreen2r.dtbo
audioinjector-ultra.dtbo piscreen.dtbo
audioinjector-wm8731-audio.dtbo pisound.dtbo
audiosense-pi.dtbo pitft22.dtbo
audremap.dtbo pitft28-capacitive.dtbo
balena-fin.dtbo pitft28-resistive.dtbo
cma.dtbo pitft35-resistive.dtbo
dht11.dtbo pps-gpio.dtbo
dionaudio-loco.dtbo pwm-2chan.dtbo
dionaudio-loco-v2.dtbo pwm.dtbo
disable-bt.dtbo pwm-ir-tx.dtbo
disable-wifi.dtbo qca7000.dtbo
dpi18.dtbo README
dpi24.dtbo rotary-encoder.dtbo
draws.dtbo rpi-backlight.dtbo
dwc2.dtbo rpi-cirrus-wm5102.dtbo
dwc-otg.dtbo rpi-dac.dtbo
enc28j60.dtbo rpi-display.dtbo
enc28j60-spi2.dtbo rpi-ft5406.dtbo
exc3000.dtbo rpi-poe.dtbo
fe-pi-audio.dtbo rpi-proto.dtbo
goodix.dtbo rpi-sense.dtbo
googlevoicehat-soundcard.dtbo rpi-tv.dtbo
gpio-fan.dtbo rpivid-v4l2.dtbo
gpio-ir.dtbo rra-digidac1-wm8741-audio.dtbo
gpio-ir-tx.dtbo sc16is750-i2c.dtbo
gpio-key.dtbo sc16is752-i2c.dtbo
gpio-no-bank0-irq.dtbo sc16is752-spi0.dtbo
gpio-no-irq.dtbo sc16is752-spi1.dtbo
gpio-poweroff.dtbo sdhost.dtbo
gpio-shutdown.dtbo sdio.dtbo
hd44780-lcd.dtbo sdtweak.dtbo
hdmi-backlight-hwhack-gpio.dtbo sh1106-spi.dtbo
hifiberry-amp.dtbo smi-dev.dtbo
hifiberry-dac.dtbo smi.dtbo
hifiberry-dacplusadc.dtbo smi-nand.dtbo
hifiberry-dacplusadcpro.dtbo spi0-cs.dtbo
hifiberry-dacplusdsp.dtbo spi1-1cs.dtbo
hifiberry-dacplus.dtbo spi1-2cs.dtbo
hifiberry-dacplushd.dtbo spi1-3cs.dtbo
hifiberry-digi.dtbo spi2-1cs.dtbo
hifiberry-digi-pro.dtbo spi2-2cs.dtbo
highperi.dtbo spi2-3cs.dtbo
hy28a.dtbo spi3-1cs.dtbo
hy28b-2017.dtbo spi3-2cs.dtbo
hy28b.dtbo spi4-1cs.dtbo
i2c0.dtbo spi4-2cs.dtbo
i2c1.dtbo spi5-1cs.dtbo
i2c3.dtbo spi5-2cs.dtbo
i2c4.dtbo spi6-1cs.dtbo
i2c5.dtbo spi6-2cs.dtbo
i2c6.dtbo spi-gpio35-39.dtbo
i2c-bcm2708.dtbo spi-gpio40-45.dtbo
i2c-gpio.dtbo spi-rtc.dtbo
i2c-mux.dtbo ssd1306.dtbo
i2c-pwm-pca9685a.dtbo ssd1306-spi.dtbo
i2c-rtc.dtbo ssd1351-spi.dtbo
i2c-rtc-gpio.dtbo superaudioboard.dtbo
i2c-sensor.dtbo sx150x.dtbo
i2s-gpio28-31.dtbo tc358743-audio.dtbo
ilitek251x.dtbo tc358743.dtbo
imx219.dtbo tinylcd35.dtbo
imx290.dtbo tpm-slb9670.dtbo
imx477.dtbo uart0.dtbo
iqaudio-codec.dtbo uart1.dtbo
iqaudio-dac.dtbo uart2.dtbo
iqaudio-dacplus.dtbo uart3.dtbo
iqaudio-digi-wm8804-audio.dtbo uart4.dtbo
irs1125.dtbo uart5.dtbo
i-sabre-q2m.dtbo udrc.dtbo
jedec-spi-nor.dtbo upstream.dtbo
justboom-both.dtbo upstream-pi4.dtbo
justboom-dac.dtbo vc4-fkms-v3d.dtbo
justboom-digi.dtbo vc4-kms-kippah-7inch.dtbo
ltc294x.dtbo vc4-kms-v3d.dtbo
max98357a.dtbo vc4-kms-v3d-pi4.dtbo
maxtherm.dtbo vga666.dtbo
mbed-dac.dtbo w1-gpio.dtbo
mcp23017.dtbo w1-gpio-pullup.dtbo
mcp23s17.dtbo w5500.dtbo
mcp2515-can0.dtbo wittypi.dtbo

pi@rpi3nhab:~ $ cat /proc/version
Linux version 5.4.51-v7+ (dom@buildbot) (gcc version 4.9.3 (crosstool-NG crosstool-ng-1.22.0-88-g8460611)) #1333 SMP Mon Aug 10 16:45:19 BST 2020

pi@rpi3nhab:~ $ i2cdetect -y 1
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: 30 -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: 40 -- -- -- -- 45 -- -- -- 49 -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- 76 --
pi@rpi3nhab:~ $

[neilh10]

Hello gosh my bad eyes - it is actually showing "nan" and for some reason with the small type I was seeing "nam" - I've corrected all the above references to use "nan"

[Namburger]

@neilh10 ahhh, my apologies, I read the title of your issue wrong and completely thought that you're trying to do something else which leads me to all type of confusion from the info that you gave :P
Scatch what I said regarding /boot/verlays.txt, that exists on mendel OS which is the official OS on the dev board!

it seems its supposed to just work, and it isn't

It is supposed to just works so this could be an issue :) Here are a couple of suggestions:

1. Make sure SPI and I2C are enable. This can be done with sudo raspi-config and go to Interfacing Options, then enable SPI + I2C and reboot.

2. Could you also apply this fix: Environmental sensor board demo not working #21 (comment)?

sudo vim /usr/lib/python3/dist-packages/coral/enviro/board.py

go to this line and change:

self._display = ssd1306(serial_interface=spi(),

to this:

self._display = ssd1306(serial_interface=spi(cs_high=True),

Then :wq! to save the file and rerun the demo

I'll try to get our documentations updated and the code fix.

[neilh10]

Hello
Yes I had already gone through with ~ udo raspi-config and go to Interfacing Options, then enable SPI + I2C
and no effect. Just repeated to make sure.

The ssd1306 looks like its already been incorporated - file attached, and this is what I actually see

        # Default to RPi.GPIO in luma and defaults GPIO.
        self._display = ssd1306(serial_interface=spi(),
                                gpio=noop(), height=32, rotate=2)

board.py.txt

rebooted and tried again. Still same problem

[Namburger]

whoopies, you have to add that cs_high=True to the serial_interface argument:

# Default to RPi.GPIO in luma and defaults GPIO.
        self._display = ssd1306(serial_interface=spi(csi_high=True),
                                gpio=noop(), height=32, rotate=2)

Sorry, I reversed the order on that previous comment...)

[neilh10]

Oh thanks for the pointer. I'm using it as a tutorial this morning, still doesn't work
as specified has error, can't find option csi_high
From https://luma-core.readthedocs.io/en/latest/interface.html
seems like for spi() there is option cs_high (so the csi_high seems to be a typo mistake on previous examples)

# Default to RPi.GPIO in luma and defaults GPIO.
        self._display = ssd1306(serial_interface=spi(cs_high=True),
                                gpio=noop(), height=32, rotate=2)

This now runs, However this still gives same "nan"

For such a simple program (with lots happening in the libs), seems like something is missing. Either specifying what version of raspberryPi OS it was tested on, OR .... ....

[neilh10]

I just rebuilt a raspberry from new on a uSD, enabled the SPI and I2C with "sudo raspi-config", added the cs_high=True.
Still same problem 'nan'

[Luisibear98]

Im having the same trouble here!
My OS version is:

• Linux version 5.4.72-v7+ (dom@buildbot) (gcc version 9.3.0 (Ubuntu 9.3.0-17ubuntu1~20.04))

Debugging the sensors structure, after each read it returns:

• {'temperature': None, 'humidity': None, 'ambient_light': None, 'pressure': None}

cheers!

[Luisibear98]

I think problems comes when board.py tries to look for the sensors.

The path /sys/bus/iio/devices/ seems to be empty

[neilh10]

I've gone with https://shop.pimoroni.com/products/enviro?variant=31155658489939 PIM486 and it worked straight away.
Be interested if you figure it out.

[Luisibear98]

I've gone with https://shop.pimoroni.com/products/enviro?variant=31155658489939 PIM486 and it worked straight away.
Be interested if you figure it out.
Thanks for the idea!

Finally decided to go for a custom version of the code. It is a modification from the original project adding more libraries to control the sensors. Now I'm getting all the values! let me know if any of you needs the code.

[jeffreycunn]

I've gone with https://shop.pimoroni.com/products/enviro?variant=31155658489939 PIM486 and it worked straight away.
Be interested if you figure it out.
Thanks for the idea!

Finally decided to go for a custom version of the code. It is a modification from the original project adding more libraries to control the sensors. Now I'm getting all the values! let me know if any of you needs the code.

What did you end up doing? Which libraries?

[Luisibear98]

I've gone with https://shop.pimoroni.com/products/enviro?variant=31155658489939 PIM486 and it worked straight away.
Be interested if you figure it out.
Thanks for the idea!

Finally decided to go for a custom version of the code. It is a modification from the original project adding more libraries to control the sensors. Now I'm getting all the values! let me know if any of you needs the code.

What did you end up doing? Which libraries?

Hi! sorry for the delay, I made a custom repo for that solution. Check my profile! :D

[Luisibear98]

I've gone with https://shop.pimoroni.com/products/enviro?variant=31155658489939 PIM486 and it worked straight away.
Be interested if you figure it out.
Thanks for the idea!

Finally decided to go for a custom version of the code. It is a modification from the original project adding more libraries to control the sensors. Now I'm getting all the values! let me know if any of you needs the code.

What did you end up doing? Which libraries?

https://github.com/Luisibear98/google-coral.git Thats the repo! just enter on the folder and install requirements!

[jeffreycunn]

Even when I download your repo, the sensor will not display RH or light level....this is really perplexing to me. I think there is something wrong at a lower level.

[Luisibear98]

Even when I download your repo, the sensor will not display RH or light level....this is really perplexing to me. I think there is something wrong at a lower level.

Did you cloned my repo and Installed the requirements.txt? Im using python3 and it is working :).
I have updated the enviro_board class. What fo yoy get when you execute it?
This is what I get:
{'CPU': 46.698, 'temperature': 35.163421630859375, 'humidity': 35.8489990234375, 'ambient_light': 53.86, 'pressure': 945.9359053930328}

[Luisibear98]

Even when I download your repo, the sensor will not display RH or light level....this is really perplexing to me. I think there is something wrong at a lower level.

In addition, could you test the test.py script I did?
I have added it now.
Just do "python3 test.py -d 0x45"
Does it print the lux?
If so just try again the enviro_board.py