Hello
i am new to piHats
I have a rasp p3 with a mini black hat. I take a enviro phat and i solder the pins… when i connect it the only think i can make it is to turn the led on / off
run the i2cdetect -y 1
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: – -- – -- – -- – -- – -- – -- –
10: – -- – -- – -- – -- – -- – -- – -- – --
20: – -- – -- – -- – -- – -- – -- – -- – --
30: – -- – -- – -- – -- – -- – -- – -- – --
40: – -- – -- – -- – -- – -- – -- – -- – --
50: – -- – -- – -- – -- – -- – -- – -- – --
60: – -- – -- – -- – -- – -- – -- – -- – --
70: – -- – -- – -- – --
i have install the libs as the instructions and everything seems ok
when i run a script take back
pi@octopi:~/Pimoroni/envirophat/examples $ python temperature.py
Light the LEDs upon temperature increase.
Press Ctrl+C to exit.
Traceback (most recent call last):
File “temperature.py”, line 18, in
temperature = weather.temperature()
File “/usr/lib/python2.7/dist-packages/envirophat/bmp280.py”, line 134, in temperature
self.update()
File “/usr/lib/python2.7/dist-packages/envirophat/bmp280.py”, line 169, in update
if self._read_byte(REGISTER_CHIPID) == 0x58: # check sensor id 0x58=BMP280
File “/usr/lib/python2.7/dist-packages/envirophat/bmp280.py”, line 116, in _read_byte
return self.i2c_bus.read_byte_data(self.addr, register)
IOError: [Errno 5] Input/output error
any ideas ?
thnx a lot for your time
You should at least be seeing something with sudo i2cdetect -y 1, could you snap a photo of your soldering and how you’e got the mini Black HAT wired up please?
nothing with
pi@octopi:~/Pimoroni/envirophat/examples $ sudo i2cdetect -y 1
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: – -- – -- – -- – -- – -- – -- –
10: – -- – -- – -- – -- – -- – -- – -- – --
20: – -- – -- – -- – -- – -- – -- – -- – --
30: – -- – -- – -- – -- – -- – -- – -- – --
40: – -- – -- – -- – -- – -- – -- – -- – --
50: – -- – -- – -- – -- – -- – -- – -- – --
60: – -- – -- – -- – -- – -- – -- – -- – --
70: – -- – -- – -- – --
Soldering looks good, how is the ribbon cable connected to the Pi at the other end?
Also looks fine! Which means I’m now slightly baffled and trying to remember if there are any other gotchas.
I suspect you’ve probably tried this, but does it work if you attached the pHAT directly to the top of the Pi?
Using https://pinout.xyz/pinout/enviro_phat as a guide, could you re-touch the i2c pins with a soldering iron, without adding any more solder, just to see if it helps? On closer inspection it’s possible the data or clock line could be shorted to ground.
so i need to retouch the 2.3.5.7 pins only ?
Yes, those are the ones most likely to have a potential short, although it’s clear that 7 (for the LEDs) is working.
I have resolder the pins
and i put it at raspy without the black hat
the same again
Nothing at sudo i2cdetect -y 1sudo i2cdetect -y 1
olny the led’s work
From the image it looks like a lot of those pins could do with more solder.
The solder should be in nice little “volcanoes” - https://learn.pimoroni.com/tutorial/sandyj/the-ultimate-guide-to-soldering
Hi,
I’m experiencing the same problem. My soldering wasn’t good, but I did decent job on the relevant pins. Couldn’t this be some firmware or hardware issue?
Have you actually enabled I2C
(In raspi-config or via the desktop settings or directly editting config.txt)
?
The LED works without I2C
