Connecting Env Unit and RFID Unit via Grove Hub on M5StickC

ws1088

I use the following code to test:

from m5stack import *
from m5ui import *
from uiflow import *
import i2c_bus

setScreenColor(0x111111)


devices = None
scan = None

i2c0 = i2c_bus.easyI2C(i2c_bus.PORTA, 0x68)
devices = []
while True:
  scan = i2c0.scan()
  if devices != scan:
    lcd.clear()
    lcd.print(str(scan), 0, 0, 0xffffff)
  devices = scan
  wait_ms(2)

I can see the I2C addresses for the Env unit and RFID unit combinations when I plug them into the Grove Hub. I can plug the Env unit in to see addresses 92 and 118, then add RFID unit to see [40, 92, 118] etc.

So I am pretty clueless why the following will fail:

rfid0 = unit.get(unit.RFID, unit.PORTA)
env1 = unit.get(unit.ENV, unit.PORTA)

Looks like I need to go to the source code and see what's going on...

ws1088

It looks like Env unit has 2 I2C addresses (92, 118)? But many times 92 will go away in the scan loop. Strange...

ajb2k3

All I can think is that the two sensors are drawing too much power for the bus.

I have both units and also the hat versions. if I find time over the week end I may have some time to test but I may need a reminder on saturday.

Double check the address's. The published addresses are in Hex but they are displayed in binary on the screen!

ajb2k3

@ws1088 Confirmed, the RFID Unit will not work with the ENV unit and will not work with the ENV hat

ws1088

@ajb2k3 said in Connecting Env Unit and RFID Unit via Grove Hub on M5StickC:

@ws1088 Confirmed, the RFID Unit will not work with the ENV unit and will not work with the ENV hat

Is the reason as you mentioned that there is not enough power? I guess not because you test it on the ENV hat with RFID unit. I noticed a lot of bus error (timeout), maybe it's a software issue? I am using UIFlow, btw. Are you using Arduino IDE and C++?

ajb2k3

@ws1088 said in Connecting Env Unit and RFID Unit via Grove Hub on M5StickC:

@ajb2k3 said in Connecting Env Unit and RFID Unit via Grove Hub on M5StickC:

@ws1088 Confirmed, the RFID Unit will not work with the ENV unit and will not work with the ENV hat

Is the reason as you mentioned that there is not enough power? I guess not because you test it on the ENV hat with RFID unit. I noticed a lot of bus error (timeout), maybe it's a software issue? I am using UIFlow, btw. Are you using Arduino IDE and C++?

Nope, only UIFlow as I'm trying to write the book on it.

ws1088

Could this be related?

http://community.m5stack.com/topic/523/problems-with-the-i2c-grove-interface

ws1088

@ajb2k3 said in Connecting Env Unit and RFID Unit via Grove Hub on M5StickC:

@ws1088 Confirmed, the RFID Unit will not work with the ENV unit and will not work with the ENV hat

wow, RFID unit will not work with ENV hat even? I though RFID unit is I2C (G32 and G33) and ENV hat is on G26 and G36...

ajb2k3

@ws1088 said in Connecting Env Unit and RFID Unit via Grove Hub on M5StickC:

@ajb2k3 said in Connecting Env Unit and RFID Unit via Grove Hub on M5StickC:

@ws1088 Confirmed, the RFID Unit will not work with the ENV unit and will not work with the ENV hat

wow, RFID unit will not work with ENV hat even? I though RFID unit is I2C (G32 and G33) and ENV hat is on G26 and G36...

I could not get them to work together but then i am not a good programmer.

maknis3

Fellow users from the past, I encountered the same problem but managed to get it working. The problem lies in the paralell access of the RFID and ENV module. If the access is isolated in a paralell process and saved in to variables, further getting the values by using these variables, you should be able to use the two modules in unison.

robski

@ws1088 said in Connecting Env Unit and RFID Unit via Grove Hub on M5StickC:

I use the following code to test:
from m5stack import *
from m5ui import *
from uiflow import *
import i2c_bus

setScreenColor(0x111111)


devices = None
scan = None

i2c0 = i2c_bus.easyI2C(i2c_bus.PORTA, 0x68)
devices = []
while True:
  scan = i2c0.scan()
  if devices != scan:
    lcd.clear()
    lcd.print(str(scan), 0, 0, 0xffffff)
  devices = scan
  wait_ms(2)
I can see the I2C addresses for the Env unit and RFID unit combinations when I plug them into the Grove Hub. I can plug the Env unit in to see addresses 92 and 118, then add RFID unit to see [40, 92, 118] etc.

So I am pretty clueless why the following will fail:
rfid0 = unit.get(unit.RFID, unit.PORTA)
env1 = unit.get(unit.ENV, unit.PORTA)
Looks like I need to go to the source code and see what's going on...

are modules working ok on their own and you see issue when both connected?