chrisb2
(Solution) "OSError: [Errno 5] EIO" when running with Micropython on Raspberry Pi Pico
Hi Chris,
I tried to get this running on my Raspberry Pi Pico and was getting an error. Here is the message:
"Traceback (most recent call last):
File "
From this thread: https://forum.micropython.org/viewtopic.php?t=4746 I saw that the Pico seems to need delays for I2C to work well, so I added the utime.sleep delays to your example code:
from ina219 import INA219
from machine import I2C
import utime
I2C_INTERFACE_NO = 1
SHUNT_OHMS = 0.1 # Check value of shunt used with your INA219
ina = INA219(SHUNT_OHMS, I2C(I2C_INTERFACE_NO, scl=machine.Pin(19), sda=machine.Pin(18)))
utime.sleep_ms(10)
ina.configure()
utime.sleep_ms(10)
print("Bus Voltage: %.3f V" % ina.voltage())
print("Current: %.3f mA" % ina.current())
print("Power: %.3f mW" % ina.power())
~~~~~~
Hope this helps anyone else with similar issues!
I'm having this same issue and am wondering if you ever figured it out?
Maybe my comment wasn't super clear - the "utime.sleep_ms(10)" code additions do fix the issue and I haven't had any trouble with the INA219 since.
I got this error when trying the code from your comment:
Traceback (most recent call last):
File "
Do you know what could be causing this?
Can you give more details on your setup? Maybe your circuit design. Also make sure you're using the right pins - I'm using pins GP 18 and GP 19 which are actually the 24th and 25th pico pins respectively.
Glad its working! There are two I2C bus connections you can use (this is using I2C 1). In my setup I'm using two INA219s - one connected to GP18, GP19 and the other connected to GP12, GP13. Just make sure you indicate which I2C bus you're using by adding the 0 or 1 to this line (reference the pico pinout to see where the I2C0 and I2C1 are). Here is what I am using:
ina = INA219(SHUNT_OHMS, I2C(1, scl=machine.Pin(19), sda=machine.Pin(18))) ina_1 = INA219(SHUNT_OHMS, I2C(0, scl=machine.Pin(13), sda=machine.Pin(12)))
Hey, I know its been a while, but I need help again. I am using the same setup for the INA219s as you recommended. Do I need a second copy of every file for the second INA board? I would assume yes, and if so, what do I need to change in the second set of files? I changed the address in the ina219.py file and in my run file. I still cant seem to get it to work.
Here is my run code if needed (starting on button press, checking every hour):
`from machine import Pin import _thread import utime
button=Pin(0, Pin.IN, Pin.PULL_DOWN)
def tp():
execfile("run.py")
def sp():
execfile("run_1.py")
time=5
buttonNow=0
while True:
if buttonNow==1:
time=time+1
print("Tracking Panel at %s:30:" % time)
tp()
print("Stationary Panel at %s:30:" % time)
sp()
utime.sleep(2.5)
buttonNow=1
else:
buttonNow=button.value()`
Run_1 file (if needed):
`from ina219_1 import INA219 from ina219_1 import DeviceRangeError from machine import I2C import utime
#data list (clear daily and add to sheet) data = []
I2C_INTERFACE_NO = 0 SHUNT_OHMS = 0.1 # Check value of shunt used with your INA219
ina = INA219(SHUNT_OHMS, I2C(I2C_INTERFACE_NO, scl=machine.Pin(13), sda=machine.Pin(12)), address=0x41) utime.sleep_ms(10) ina.configure() utime.sleep_ms(10) try: data = ['Bus Voltage: %.3f V' % ina.voltage(), 'Bus Current: %.3f mA' % ina.current(),'Shunt voltage: %.3f mV' % ina.shunt_voltage(),'Power: %.3f mW' % ina.power()] print(data) except DeviceRangeError as e: # Current out of device range with specified shunt resister print ("e")`
Error:
"Traceback (most recent call last):
File "
The ina219_1.py file is the same as the default one but with address changed to 0x41 and the range changed to 16V
PS: Thanks for all the help!
Also if you dont feel like reading this I could just look at your code and figure it out from there.
So you are talking to two ina219's from one pico?
In this case one of them need a different address on i2c bus, see section 8.5.5.1 of the datasheet. Then in code each ina219 instance can be initialize with its own address.
Regards Chris
On Sun, 9 Oct 2022, 10:42 IHasToes1234, @.***> wrote:
Also if you dont feel like reading this I could just look at your code and figure it out.
— Reply to this email directly, view it on GitHub https://github.com/chrisb2/pyb_ina219/issues/9#issuecomment-1272401858, or unsubscribe https://github.com/notifications/unsubscribe-auth/AAXR2V5RMP5JUYCM26CQT4TWCHTEXANCNFSM563DDDJQ . You are receiving this because you are subscribed to this thread.Message ID: @.***>
Hey Chris!
I am very dumb and have no idea what you mean. I soldered the pins on the breakout board to make the address 0x41 but have no idea what to do code wise. Do I need a separate ina219.py, and if so, do I only have to change the address for the second. I believe they are on different i2c buses as well.
Assuming you have correctly configured the two devices with different addresses, you can attach them both to the same i2c bus (same two i2c sda/scl pins). You only need one ina219.py file and import.
The address can be passed in as an argument to the constructor, see address arg: https://github.com/chrisb2/pyb_ina219#functions
I suggest you separately connect each device and check its responding correctly on its address, then attach both and test.
Chris
I'm getting errors when a relay connects and disconnects the sensor to a battery and the code runs in a loop. Nothing is connected on the other side but it says current overflow. I've tried adding delays but still randomly after sometime I get these errors.
Its a Pico W
Traceback (most recent call last):
File "
or..
Traceback (most recent call last):
File "
Also what does "The library currently only supports continuous reads of voltage and power, but not triggered reads" means, I can't use it like this?
No comments for a while, so closing, please raise a new issue if required. Thx