Posts made by Oene Bakker

@Chris-Stratton slip of the pen I meant microcontrollers....

@Ken-Conrad I tested it at home and it really was 4.5 hours active. So perhaps these Ultrafire batteries are of better quality(?)

@Chris-Stratton no particularly reason. Just because it can. Also tried some other microprocessor controllers (raspberry pi, eps12 and arduino). Was just curious it would work on the omega 2. Using the battery pack with 4x 18650 (6000 mA) batteries gives a lifespan of approximately 4.5 hours.

@Prakhar-Birla no sorry. I stopped trying.

In this project I'm going to connect a GPS module and use it as a GPS tracker.

Hardware

For this project I'm using:

• Onion Omega 2 plus

• U-BLOX NEO-6M GPS module

• PL2303HXD Serial to USB cable

• Battery case with USB in and out (5V/2.1A max)

• 4x 18650 (3.7V/6000mA) batteries

• Breadboard and some cables

The GPS module can be used on 3.3V or 5V. Connected to the battery pack it can be used for approximately 4.5 hours (not bad I think).

Connect the GPS module as follow to the PL2303HXD:

GPS - PL2303HXD
VCC -  5V
GND -  GND
TX    - RXD (white)
RX    - TXD (green)

Connect PL2302HXD to Onion Omega 2+ USB

Installation

Step 1
Use the latest firmware

oupgrade
Device Firmware Version: 0.1.10 b160
Checking latest version online...
Repo Firmware Version: 0.1.10 b160
Comparing version numbers
Device firmware is up to date!

Step 2
Update packages

opkg update

Step 3
I prefer nano as an editor, but there is no default installation

opkg install nano

Step 4
I want to expand the filesystem so I can write large tracker files. So I need the following utility:

opkg install e2fsprogs

Step 5
To use the USB to serial I need the following installations:

opkg install coreutils-stty kmod-usb-serial-pl2303

Step 6
Add a SD card (I use a 2GB SD card)

Look for SD card:

dmesg | grep mmc
[ 4.786320] mmc0: new high speed SD card at address 1234
[ 4.803969] mmcblk0: mmc0:1234 SA02G 1.85 GiB
[ 4.896881] mmcblk0: p1
...

Format and mount SD card

root@Omega-5101:~# mkfs.ext4 /dev/mmcblk0
root@Omega-5101:~# mkdir /mnt/mmcblk0
root@Omega-5101:~# mount /dev/mmcblk0 /mnt/mmcblk0/

Edit fstab

root@Omega-5101:~# /sbin/block detect > /etc/config/fstab

root@Omega-5101:~# uci show fstab
fstab.@global[0]=global
fstab.@global[0].anon_swap='0'
fstab.@global[0].anon_mount='0'
fstab.@global[0].auto_swap='1'
fstab.@global[0].auto_mount='1'
fstab.@global[0].delay_root='5'
fstab.@global[0].check_fs='0'
fstab.@mount[0]=mount
fstab.@mount[0].target='/mnt/mmcblk0'
fstab.@mount[0].uuid='5417dc6b-0135-4f71-8ea0-f81d0666989c'
fstab.@mount[0].enabled='0'

Enable mount

root@Omega-5101:~# uci set fstab.@mount[0].enabled='1'
root@Omega-5101:~# uci commit fstab
root@Omega-5101:~# uci show fstab
fstab.@global[0]=global
fstab.@global[0].anon_swap='0'
fstab.@global[0].anon_mount='0'
fstab.@global[0].auto_swap='1'
fstab.@global[0].auto_mount='1'
fstab.@global[0].delay_root='5'
fstab.@global[0].check_fs='0'
fstab.@mount[0]=mount
fstab.@mount[0].target='/mnt/mmcblk0'
fstab.@mount[0].uuid='5417dc6b-0135-4f71-8ea0-f81d0666989c'
fstab.@mount[0].enabled='1'

Make it permanent

root@Omega-5101:~# /etc/init.d/fstab enable
root@Omega-5101:~# df -h
Filesystem Size Used Available Use% Mounted on
/dev/root 5.5M 5.5M 0 100% /rom
tmpfs 61.4M 216.0K 61.2M 0% /tmp
/dev/mtdblock6 25.1M 1.2M 23.9M 5% /overlay
overlayfs:/overlay 25.1M 1.2M 23.9M 5% /
tmpfs 512.0K 0 512.0K 0% /dev
/dev/mmcblk0 1.8G 5.5M 1.7G 0% /mnt/mmcblk0

Step 7
Expand filesystem (overlay)

root@Omega-5101:~# mount /dev/mmcblk0 /mnt ; tar -C /overlay -cvf - . | tar -C /mnt -xf - ; umount /mnt

Edit fstab

root@Omega-5101:~# nano /etc/config/fstab

config 'global'
option anon_swap '0'
option anon_mount '0'
option auto_swap '1'
option auto_mount '1'
option delay_root '5'
option check_fs '0'

config 'mount'
option target '/mnt/mmcblk0'
option uuid '5417dc6b-0135-4f71-8ea0-f81d0666989c'
option enabled '0'

Change to:

config 'global'
option anon_swap '0'
option anon_mount '0'
option auto_swap '1'
option auto_mount '1'
option delay_root '5'
option check_fs '0'

config 'mount'
option target '/overlay'
option uuid '5417dc6b-0135-4f71-8ea0-f81d0666989c'
option enabled '1'

Ctr+X --> Y

Reboot

root@Omega-5101:~# reboot
root@Omega-5101:~# df -h
Filesystem Size Used Available Use% Mounted on
/dev/root 5.5M 5.5M 0 100% /rom
tmpfs 61.4M 104.0K 61.3M 0% /tmp
/dev/mmcblk0 1.8G 6.7M 1.7G 0% /overlay
overlayfs:/overlay 1.8G 6.7M 1.7G 0% /
tmpfs 512.0K 0 512.0K 0% /dev

Step 8
Set timezone.
I'm living in the Netherlands so I choose the timezone for Amsterdam.
The timezones list is on: Timezones

We also need the corresponding NTP-servers. I'm using the dutch (nl) pool servers.
The pool servers list is on: NTP pool

Change timezone en ntp-servers to your choices

root@Omega-5101:/# cd /etc/config
root@Omega-5101:/etc/config# nano system

config system
#option timezone 'GMT0'
option timezone 'CET-1CEST,M3.5.0,M10.5.0/3'
option ttylogin '0'
option log_size '64'
option urandom_seed '0'
option cronloglevel '8'
option hostname 'Omega-5101'
#
config timeserver 'ntp'
option enabled '1'
option enable_server '0'
list server '0.nl.pool.ntp.org'
list server '1.nl.pool.ntp.org'
list server '2.nl.pool.ntp.org'
list server '3.nl.pool.ntp.org'

Ctrl+X + Y

root@Omega-5101:/etc/config# reboot

Check date / time

root@Omega-5101:~# date
Fri Mar 10 17:15:02 CET 2017

Step 9
Install Python

root@Omega-5101:~# opkg update
root@Omega-5101:~# opkg install python
root@Omega-5101:~# opkg install python-pyserial

Step 10
Check if GPS is connected

root@Omega-5101:~# dmesg | grep pl2303
[ 10.664492] usbcore: registered new interface driver pl2303
[ 10.670369] usbserial: USB Serial support registered for pl2303
[ 10.676466] pl2303 2-1:1.0: pl2303 converter detected
[ 10.703003] usb 2-1: pl2303 converter now attached to ttyUSB0

Getting data from GPS

root@Omega-5101:~/gps# stty -F /dev/ttyUSB0 ispeed 9600 && cat </dev/ttyUSB0
$GPRMC,154105.00,A,5315.64610,N,00601.92077,E,0.092,,030317,,,A*72
$GPGGA,154105.00,5315.64610,N,00601.92077,E,1,08,1.00,-7.0,M,45.6,M,,*77
...
Ctrl+Z

Step 10

Make tracker source

root@Omega-5101:~# cd ~
root@Omega-5101:~# mkdir gps
root@Omega-5101:~# cd gps
root@Omega-5101:~# nano tracker.py

Source:
tracker.py

Step 11
Test the tracker

root@Omega-5101:~/gps# python tracker.py
Start reading: /dev/ttyUSB0
[1] Wait for GPS data 2017-03-10 17:22:37
[1] GPS tracker alive at 2017-03-10 17:22:39
[2] GPS tracker alive at 2017-03-10 17:22:44
[3] GPS tracker alive at 2017-03-10 17:22:50
[4] GPS tracker alive at 2017-03-10 17:22:55
...

Ctrl+Z of Ctrl+C

Show ublox file

root@Omega-5101:~/gps# nano t20170310172237.ubx

$GPGLL,5315.64852,N,00601.92650,E,162238.00,A,A*65
$GPGGA,162239.00,5315.64882,N,00601.92671,E,1,06,2.13,1.6,M,45.6,M,,*59
...

Step 12
So I connected the GPS tracker to the battery pack and went for a bike ride and recorded the result.
The ublox fileformat can be used with u-center

This is the result:

@WereCatf
No but when I use a 10K pull up I get the same results

root@Omega-5101:~/checkHumidity/bin# ./checkHumidity 20 DHT11
-255.000000
-255.000000

Also tried lower values 4.7K and 1K but that didn't work also

@WereCatf
Yes, sorry was a bit too quick

So went back to the old firmware

root@Omega-5101:~/checkHumidity/bin# oupgrade -c

Device Firmware Version: 0.1.6 b137
Checking latest version online...
Repo Firmware Version: 0.1.9 b149
Comparing version numbers
New firmware version available, need to upgrade device firmware

Now I'm getting:
root@Omega-5101:~/checkHumidity/bin# ./checkHumidity 20 DHT11
-255.000000
-255.000000

Checked the wiring and tried different GPIO's all with the same result

@WereCatf
I downloaden the request package : https://dl.dropboxusercontent.com/u/11811685/checkHumidity.tar.gz

Unpacked it:
tar -zxvf checkHumidity.tar.gz

Did the chmod:
chmod -R 755 /root/checkHumidity/bin/checkHumidity

I checked the firmware
root@Omega-5101:~# oupgrade

Device Firmware Version: 0.1.9 b149
Checking latest version online...
Repo Firmware Version: 0.1.9 b149
Comparing version numbers
Device firmware is up to date!

But I'm getting a segmation fault:

root@Omega-5101:~/checkHumidity/bin# ./checkHumidity 20 DHT11
Segmentation fault

I tried different GPIO pin, all gave the same result

@WereCatf : thnx!!!!!

Following the tutorial I get a syntax eror when executing checkHumidity:

root@Omega-5101:~/checkHumidity/bin# ./checkHumidity 1 DHT11
./checkHumidity: line 1: syntax error: unexpected "(" (expecting ")")
root@Omega-5101:~/checkHumidity/bin#