GrovePi+ Humidity&Temperature Sensor showing -1

min.hm95 · March 8, 2018, 2:30am

Hi, I am having an issue with my Humidity & Temperature sensor. Initially, I am using port D7 but due to change in code, I switched the port to D4. Here is my code:

import grovepi
import math
import time

sensor = 4

blue = 0
white = 1

while True:
 try:
     [temp,humidity] = grovepi.dht(sensor,blue)
     if math.isnan(temp) == False and math.isnan(humidity) == False:
         print("temp = %.02f C humidity =%.02f%%"%(temp, humidity))
     else:
         print("nan values")
     time.sleep(1)
     
 except IOError:
     print("Error")

The codes is the exact one that i found in the existing forums here. But I changed the sleep time to 1 as i want the temp and humidity to be displayed slowly and one at a time

GrovePi is installed.

Things i tried:

update firmware of grovepi
reinstall grovepi
troubleshoot grovepi

1 and 2 should resolve the issue but it doesn’t. For 3 i saw the logs and everything seems to be fine. I will post the log files later on.

Plus i am not using raspbian jessie and raspbian for robots.
I am using Raspbian from Noobs.

RobertLucian · March 9, 2018, 10:42pm

Hi @min.hm95,

I think this could be linked to a bug that started manifested not long ago. So apart from showing us the logs you get with the troubleshooter, could you also show us what uname -a command outputs you?

I have a gut feeling this could be related to the kernel version of Linux.

Thank you!

min.hm95 · March 12, 2018, 2:59am

This is the output i received from the command you asked me to enter:

Linux dex 4.4.50-v7+ #970 SMP Mon Feb 20 19:18:29 GMT 2017 armv7l GNU/Linux

By the way, I changed to raspbian for robots made by dexterindustries

here is the log file:

Check space left
================
Filesystem      Size  Used Avail Use% Mounted on
/dev/root       3.6G  3.0G  419M  88% /
devtmpfs        427M     0  427M   0% /dev
tmpfs           432M     0  432M   0% /dev/shm
tmpfs           432M   12M  420M   3% /run
tmpfs           5.0M  4.0K  5.0M   1% /run/lock
tmpfs           432M     0  432M   0% /sys/fs/cgroup
/dev/mmcblk0p1   63M   21M   43M  33% /boot
tmpfs            87M     0   87M   0% /run/user/1000

Check for dependencies
======================
python 2.7.9-1 install ok installed
python-pip 1.5.6-5 install ok installed
git 1:2.1.4-2.1+deb8u5 install ok installed
libi2c-dev 3.1.1+svn-2 install ok installed
python-serial 2.6-1.1 install ok installed
python-rpi.gpio 0.6.3~jessie-1 install ok installed
i2c-tools 3.1.1+svn-2 install ok installed
python-smbus 3.1.1+svn-2 install ok installed
arduino 2:1.6.0 install ok installed
minicom 2.7-1+deb8u1 install ok installed
scratch 1.4.0.6~dfsg1-5 install ok installed

wiringPi Not Found (ERR)
wiringPi Found
I2C already removed from blacklist
SPI already removed from blacklist


Check for addition in /modules
==============================
I2C-dev already there
i2c-bcm2708 already there
spi-dev already there


Hardware revision
=================
gpio version: 2.36
Copyright (c) 2012-2015 Gordon Henderson
This is free software with ABSOLUTELY NO WARRANTY.
For details type: gpio -warranty

Raspberry Pi Details:
  Type: Pi 3, Revision: 02, Memory: 1024MB, Maker: Embest 
  * Device tree is enabled.
  *--> Raspberry Pi 3 Model B Rev 1.2
  * This Raspberry Pi supports user-level GPIO access.


Check the /dev folder
=====================
i2c-1
spidev0.0
spidev0.1
ttyAMA0

USB device status
=================
Bus 001 Device 005: ID 17ef:6019 Lenovo 
Bus 001 Device 004: ID 0461:4e04 Primax Electronics, Ltd 
Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp. SMSC9512/9514 Fast Ethernet Adapter
Bus 001 Device 002: ID 0424:9514 Standard Microsystems Corp. 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=dwc_otg/1p, 480M
    |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/5p, 480M
        |__ Port 1: Dev 3, If 0, Class=Vendor Specific Class, Driver=smsc95xx, 480M
        |__ Port 2: Dev 4, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
        |__ Port 2: Dev 4, If 1, Class=Human Interface Device, Driver=usbhid, 1.5M
        |__ Port 3: Dev 5, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
Raspbian for Robots Version
===========================
V 7.3

This version of Raspbian was modified by Dexter Industries on the Jessie Raspbian Build.
This version was updated on 2017.09.28


Hostname
========
dex


Checking for Atmega chip
========================


avrdude: Version 5.10, compiled on Jun 18 2012 at 12:38:29
         Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
         Copyright (c) 2007-2009 Joerg Wunsch

         System wide configuration file is "/etc/avrdude.conf"
         User configuration file is "/root/.avrduderc"
         User configuration file does not exist or is not a regular file, skipping

         Using Port                    : unknown
         Using Programmer              : gpio
         AVR Part                      : ATMEGA328P
         Chip Erase delay              : 9000 us
         PAGEL                         : PD7
         BS2                           : PC2
         RESET disposition             : dedicated
         RETRY pulse                   : SCK
         serial program mode           : yes
         parallel program mode         : yes
         Timeout                       : 200
         StabDelay                     : 100
         CmdexeDelay                   : 25
         SyncLoops                     : 32
         ByteDelay                     : 0
         PollIndex                     : 3
         PollValue                     : 0x53
         Memory Detail                 :

                                  Block Poll               Page                       Polled
           Memory Type Mode Delay Size  Indx Paged  Size   Size #Pages MinW  MaxW   ReadBack
           ----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ----- ---------
           eeprom        65     5     4    0 no       1024    4      0  3600  3600 0xff 0xff
           flash         65     6   128    0 yes     32768  128    256  4500  4500 0xff 0xff
           lfuse          0     0     0    0 no          1    0      0  4500  4500 0x00 0x00
           hfuse          0     0     0    0 no          1    0      0  4500  4500 0x00 0x00
           efuse          0     0     0    0 no          1    0      0  4500  4500 0x00 0x00
           lock           0     0     0    0 no          1    0      0  4500  4500 0x00 0x00
           calibration    0     0     0    0 no          1    0      0     0     0 0x00 0x00
           signature      0     0     0    0 no          3    0      0     0     0 0x00 0x00

         Programmer Type : GPIO
         Description     : Use sysfs interface to bitbang GPIO lines

avrdude: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.00s

avrdude: Device signature = 0x1e950f

avrdude done.  Thank you.


Checking I2C bus for devices
============================

Checking I2C bus 0
==================
Error: Could not open file `/dev/i2c-0' or `/dev/i2c/0': No such file or directory

Checking I2C bus 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: -- -- -- -- -- -- -- --                         

Checking for firmware version
=============================
Traceback (most recent call last):
  File "/home/pi/Dexter/GrovePi/Software/Python/grove_firmware_version_check.py", line 40, in <module>
    print("GrovePi has firmware version: %s" %grovepi.version())
  File "/home/pi/Dexter/GrovePi/Software/Python/grovepi.py", line 266, in version
    return "%s.%s.%s" % (number[1], number[2], number[3])
TypeError: 'int' object has no attribute '__getitem__'

min.hm95 · March 13, 2018, 2:50am

Fixed it, it is the grovepi+ hardware issue. Here is the log file for the troubleshoot with the new grovepi+ replacement i got.


Check space left
================
Filesystem      Size  Used Avail Use% Mounted on
/dev/root       3.6G  3.0G  402M  89% /
devtmpfs        427M     0  427M   0% /dev
tmpfs           432M     0  432M   0% /dev/shm
tmpfs           432M  6.2M  425M   2% /run
tmpfs           5.0M  4.0K  5.0M   1% /run/lock
tmpfs           432M     0  432M   0% /sys/fs/cgroup
/dev/mmcblk0p1   63M   21M   43M  33% /boot
tmpfs            87M     0   87M   0% /run/user/1000

Check for dependencies
======================
python 2.7.9-1 install ok installed
python-pip 1.5.6-5 install ok installed
git 1:2.1.4-2.1+deb8u5 install ok installed
libi2c-dev 3.1.1+svn-2 install ok installed
python-serial 2.6-1.1 install ok installed
python-rpi.gpio 0.6.3~jessie-1 install ok installed
i2c-tools 3.1.1+svn-2 install ok installed
python-smbus 3.1.1+svn-2 install ok installed
arduino 2:1.6.0 install ok installed
minicom 2.7-1+deb8u1 install ok installed
scratch 1.4.0.6~dfsg1-5 install ok installed

wiringPi Not Found (ERR)
wiringPi Found
I2C already removed from blacklist
SPI already removed from blacklist


Check for addition in /modules
==============================
I2C-dev already there
i2c-bcm2708 already there
spi-dev already there


Hardware revision
=================
gpio version: 2.36
Copyright (c) 2012-2015 Gordon Henderson
This is free software with ABSOLUTELY NO WARRANTY.
For details type: gpio -warranty

Raspberry Pi Details:
  Type: Pi 3, Revision: 02, Memory: 1024MB, Maker: Embest 
  * Device tree is enabled.
  *--> Raspberry Pi 3 Model B Rev 1.2
  * This Raspberry Pi supports user-level GPIO access.


Check the /dev folder
=====================
i2c-1
spidev0.0
spidev0.1
ttyAMA0

USB device status
=================
Bus 001 Device 005: ID 17ef:6019 Lenovo 
Bus 001 Device 004: ID 0461:4e04 Primax Electronics, Ltd 
Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp. SMSC9512/9514 Fast Ethernet Adapter
Bus 001 Device 002: ID 0424:9514 Standard Microsystems Corp. 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=dwc_otg/1p, 480M
    |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/5p, 480M
        |__ Port 1: Dev 3, If 0, Class=Vendor Specific Class, Driver=smsc95xx, 480M
        |__ Port 4: Dev 4, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
        |__ Port 4: Dev 4, If 1, Class=Human Interface Device, Driver=usbhid, 1.5M
        |__ Port 5: Dev 5, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
Raspbian for Robots Version
===========================
V 7.3

This version of Raspbian was modified by Dexter Industries on the Jessie Raspbian Build.
This version was updated on 2017.09.28


Hostname
========
dex


Checking for Atmega chip
========================


avrdude: Version 5.10, compiled on Jun 18 2012 at 12:38:29
         Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
         Copyright (c) 2007-2009 Joerg Wunsch

         System wide configuration file is "/etc/avrdude.conf"
         User configuration file is "/root/.avrduderc"
         User configuration file does not exist or is not a regular file, skipping

         Using Port                    : unknown
         Using Programmer              : gpio
         AVR Part                      : ATMEGA328P
         Chip Erase delay              : 9000 us
         PAGEL                         : PD7
         BS2                           : PC2
         RESET disposition             : dedicated
         RETRY pulse                   : SCK
         serial program mode           : yes
         parallel program mode         : yes
         Timeout                       : 200
         StabDelay                     : 100
         CmdexeDelay                   : 25
         SyncLoops                     : 32
         ByteDelay                     : 0
         PollIndex                     : 3
         PollValue                     : 0x53
         Memory Detail                 :

                                  Block Poll               Page                       Polled
           Memory Type Mode Delay Size  Indx Paged  Size   Size #Pages MinW  MaxW   ReadBack
           ----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ----- ---------
           eeprom        65     5     4    0 no       1024    4      0  3600  3600 0xff 0xff
           flash         65     6   128    0 yes     32768  128    256  4500  4500 0xff 0xff
           lfuse          0     0     0    0 no          1    0      0  4500  4500 0x00 0x00
           hfuse          0     0     0    0 no          1    0      0  4500  4500 0x00 0x00
           efuse          0     0     0    0 no          1    0      0  4500  4500 0x00 0x00
           lock           0     0     0    0 no          1    0      0  4500  4500 0x00 0x00
           calibration    0     0     0    0 no          1    0      0     0     0 0x00 0x00
           signature      0     0     0    0 no          3    0      0     0     0 0x00 0x00

         Programmer Type : GPIO
         Description     : Use sysfs interface to bitbang GPIO lines

avrdude: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.00s

avrdude: Device signature = 0x1e950f
avrdude: safemode: lfuse reads as FF
avrdude: safemode: hfuse reads as DA
avrdude: safemode: efuse reads as 5

avrdude: safemode: lfuse reads as FF
avrdude: safemode: hfuse reads as DA
avrdude: safemode: efuse reads as 5
avrdude: safemode: Fuses OK

avrdude done.  Thank you.


Checking I2C bus for devices
============================

Checking I2C bus 0
==================
Error: Could not open file `/dev/i2c-0' or `/dev/i2c/0': No such file or directory

Checking I2C bus 1
==================
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          -- 04 -- -- -- -- -- -- -- -- -- -- -- 
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
70: -- -- -- -- -- -- -- --                         

Checking for firmware version
=============================
GrovePi has firmware version: 1.2.7

if you compare the log file above with this, you can see the difference in the logs.

RobertLucian · March 13, 2018, 8:02pm

Hi @min.hm95,

Hmm, that’s good to know. So, basically, the GrovePi acted as if there was no firmware on it.
I can only assume the traces for SPI or the I2C connections have a cold joint somewhere that impedes communication.

@JohnC, have you encountered such situations with the GrovePi?

Thank you!