[SOLVED] LCD Module throw exception

scratch
rgblcd

#1

Dear team,

I have bought GrovePi and start to test it using provided Scratch examples. The LED example was success. However, the LCD example always fail with an error "GrovePi Scratch: Error <type ‘exceptions.ImportError’>.


#2

Hi @sramctc,

Does it work if you just run a python example for the LCD? Here’s a link to a bunch of LCD examples.

Thanks!


#3

@RobertLucian
Dear Robert,

Yes, it works well using Python.


#4

Okay, so then I’m bringing @cleoqc into this discussion.


#5

@RobertLucian

Thanks a lot

Here is the “Test and troubleshooting” log

Check space left
================
Filesystem      Size  Used Avail Use% Mounted on
/dev/root        27G  5.3G   21G  21% /
devtmpfs        460M     0  460M   0% /dev
tmpfs           464M     0  464M   0% /dev/shm
tmpfs           464M   13M  452M   3% /run
tmpfs           5.0M  4.0K  5.0M   1% /run/lock
tmpfs           464M     0  464M   0% /sys/fs/cgroup
/dev/mmcblk0p6   68M   22M   47M  32% /boot
tmpfs            93M     0   93M   0% /run/user/1000
/dev/mmcblk0p5   30M  454K   28M   2% /media/pi/SETTINGS

Check for dependencies
======================
python 2.7.13-2 install ok installed
python-pip 9.0.1-2+rpt2 install ok installed
git 1:2.11.0-3+deb9u3 install ok installed
libi2c-dev 3.1.2-3 install ok installed
python-serial 3.2.1-1 install ok installed
python-rpi.gpio 0.6.3~stretch-1 install ok installed
i2c-tools 3.1.2-3 install ok installed
python-smbus 3.1.2-3 install ok installed
arduino 2:1.0.5+dfsg2-4.1 install ok installed
minicom 2.7-1.1 install ok installed
scratch 1.4.0.6~dfsg1-5 install ok installed

find: ‘/run/user/1000/gvfs’: Permission denied
wiringPi Not Found (ERR)
find: ‘/run/user/1000/gvfs’: Permission denied
I2C still in blacklist (ERR)
SPI still in blacklist (ERR)


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


Hardware revision
=================
gpio version: 2.44
Copyright (c) 2012-2017 Gordon Henderson
This is free software with ABSOLUTELY NO WARRANTY.
For details type: gpio -warranty

Raspberry Pi Details:
  Type: Unknown13, Revision: 03, Memory: 1024MB, Maker: Sony 
  * Device tree is enabled.
  *--> Raspberry Pi 3 Model B Plus Rev 1.3
  * This Raspberry Pi supports user-level GPIO access.


Check the /dev folder
=====================
i2c-1
ttyAMA0

USB device status
=================
Bus 001 Device 004: ID 0424:7800 Standard Microsystems Corp. 
Bus 001 Device 003: ID 0424:2514 Standard Microsystems Corp. USB 2.0 Hub
Bus 001 Device 002: ID 0424:2514 Standard Microsystems Corp. USB 2.0 Hub
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/4p, 480M
        |__ Port 1: Dev 3, If 0, Class=Hub, Driver=hub/3p, 480M
            |__ Port 1: Dev 4, If 0, Class=Vendor Specific Class, Driver=lan78xx, 480M
Raspbian for Robots Version
===========================
cat: /home/pi/di_update/Raspbian_For_Robots/Version: No such file or directory


Hostname
========
raspberrypi


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:          03 04 -- -- -- -- -- -- -- -- -- -- -- 
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- 3e -- 
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
60: -- -- 62 -- -- -- -- -- -- -- -- -- -- -- -- -- 
70: -- -- -- -- -- -- -- --                         

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


#6

Hi @sramctc,

It looks like you have an import error in Scratch - it’s not that the GrovePi isn’t working or accessible.
The GrovePi and the Grove RGB LCD work just fine, so if there’s anything wrong, then it must be coming from Scratch.

@cleoqc, could it be caused by some uninstalled dependency?


#7

hello @sramctc

Could you tell me if you are running Raspbian for Robots, or did you install the GrovePi library on your own SD card? Also, are you on Jessie or Stretch?
Thanks


#8

@cleoqc

Dear cleoqc,

As I remember,

  1. Download Noobs
  2. Install Raspbian
  3. Following steps from https://www.dexterindustries.com/GrovePi/get-started-with-the-grovepi/setting-software/

#9

@sramctc
The cause has been found, we’re currently looking at the best approach for a fix.
Cleo


#10

Hello @cleoqc

I’ve just started using Raspbian for Robots with GrovePi+ and I also encountered the same worrying LCD exception as @sramctc (when running both Scratch and Python built-in examples provided), but the LCD does work okay when running the grove_rgb_lcd.py script from GitHub.

I’m so relieved to discover this thread and that the cause has been found to be software related.

However, I’ve been asked to run a Scratch coding workshop for children in three weeks time to demonstrate the GrovePi’s capabilities and the LCD is such an important component.

Do you have any idea of the timescale for a fix?

Many thanks in advance


#11

Hello @XanderBC and @sramctc

The fix is in. If you do a DI Update on your Raspbian for Robots, the fix will be installed on your SD cards.

Apologies for the hiccup,
Cleo


#12

Wow! Many thanks @cleoqc for your prompt fix - so far so good!


#13

@cleoqc

Thanks a lot


#14