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by DougieLawson
Thu Jun 21, 2018 9:41 pm
Forum: General discussion
Topic: Pi Is Too Complicated
Replies: 59
Views: 1377

Re: Pi Is Too Complicated

All was fine until people started arguing "that's not what they're using in business and industry" also presents a compelling reason to keep the official operating system as close to Debian as possible. At the same time, if I understand the original idea correctly, the golden age of learning enable...
by DougieLawson
Thu Jun 21, 2018 6:13 pm
Forum: Troubleshooting
Topic: Mount HD from 'Pi-B' to 'Pi-A' - Unable to find suitable address
Replies: 2
Views: 43

Re: Mount HD from 'Pi-B' to 'Pi-A' - Unable to find suitable address

On RPi-B create /etc/exports

Code: Select all

/media/tvshows 192.168.1.0/24(rw,sync,no_subtree_check,no_root_squash)
On RPi-A add a line to /etc/fstab

Code: Select all

192.168.1.111:/media/tvshows /media/tvshows nfs defaults,noatime,x-systemd.automount 0 0
Complete docs here: https://help.ubuntu.com/community/SettingUpNFSHowTo
by DougieLawson
Thu Jun 21, 2018 6:06 pm
Forum: Troubleshooting
Topic: /etc/sudoers: syntax error near line 28
Replies: 3
Views: 54

Re: /etc/sudoers: syntax error near line 28

If you can still use sudo then run sudo visudo. That sanity checks your sudoers file before saving it.
by DougieLawson
Thu Jun 21, 2018 6:04 pm
Forum: General discussion
Topic: Formatting a pendrive which is flashed with raspbian jessie using ethcer
Replies: 3
Views: 74

Re: Formatting a pendrive which is flashed with raspbian jessie using ethcer

Install gparted on your Raspberry. Use that to reformat it with a MBR partition table and one single FAT/exFAT/vFAT partition.
by DougieLawson
Thu Jun 21, 2018 6:02 pm
Forum: Troubleshooting
Topic: Unable to fully set up phpmyadmin
Replies: 19
Views: 324

Re: Unable to fully set up phpmyadmin

sudo a2enmod php
by DougieLawson
Thu Jun 21, 2018 5:43 pm
Forum: Windows 10 for IoT
Topic: How to find the IP of Pi 3 without monitor
Replies: 13
Views: 213

Re: How to find the IP of Pi 3 without monitor

Is it wired to your router or are you assuming it's going to connect to your WiFi without any credentials?

If it's wired and booted you should be able to find it with Fing, NMAP or advanced IP scanner (or any other LAN scanner).
by DougieLawson
Thu Jun 21, 2018 12:59 pm
Forum: Troubleshooting
Topic: Socket error [101]: Network not rechable
Replies: 5
Views: 143

Re: Socket error [101]: Network not rechable

So get the output from the following commands

traceroute 37.187.106.16
traceroute test.mosquitto.org
ping -c3 37.187.106.16
ping -c3 test.mosquitto.org


mosquitto_sub -t 'F215166/test' -v -h test.mosquitto.org &
mosquitto_pub -t 'F215166/test' -h test.mosquitto.org -m "$(date +%Y%m%d)"
by DougieLawson
Thu Jun 21, 2018 8:28 am
Forum: Advanced users
Topic: How to get udev ignoring GPIO states upon bootup?
Replies: 6
Views: 138

Re: How to get udev ignoring GPIO states upon bootup?

GPIO28 and 29 are not externalised on any 40-pin Raspberry Pi. They're only available on a CM/CM3/CM3L and on the RPi1B with the P5 header https://elinux.org/RPi_Low-level_peripherals#P5_header.
by DougieLawson
Thu Jun 21, 2018 12:29 am
Forum: General discussion
Topic: Pi Is Too Complicated
Replies: 59
Views: 1377

Re: Pi Is Too Complicated

Could you give an example of something that doesn't work on Stretch, that does work on Wheezy? What no longer works are the tutorials, learning resources and human knowledge base of how to do things. Moreover, it is difficult to make a case for creating soon-to-be-useless teaching resources when th...
by DougieLawson
Thu Jun 21, 2018 12:24 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: UART communication between Raspberry Pi 3 and PIC18F4550
Replies: 13
Views: 678

Re: UART communication between Raspberry Pi 3 and PIC18F4550

Code: Select all

#!/usr/bin/python3

bytes_1 = b'some bytes from serial here'
string_1 = bytes_1.decode()

print (bytes_1)
print (string_1)
by DougieLawson
Wed Jun 20, 2018 10:44 pm
Forum: Beginners
Topic: Using a cellphone to boost my Pi
Replies: 6
Views: 157

Re: Using a cellphone to boost my Pi

Imperf3kt wrote:
Wed Jun 20, 2018 10:13 pm
Can you boost the performance of your PC, with a phone?
It only works for my PC with my Android phone when I've got a tin-foil top hat on my head.
https://illuminaughtyboutique.wordpress ... your-mind/
by DougieLawson
Wed Jun 20, 2018 10:42 pm
Forum: Troubleshooting
Topic: Unable to fully set up phpmyadmin
Replies: 19
Views: 324

Re: Unable to fully set up phpmyadmin

Try starting with a fresh SDCard with a fresh copy of Raspbian and do nothing special other than
sudo apt update; sudo apt install apache2 phpmyadmin;
by DougieLawson
Wed Jun 20, 2018 10:10 pm
Forum: Troubleshooting
Topic: Unable to fully set up phpmyadmin
Replies: 19
Views: 324

Re: Unable to fully set up phpmyadmin

Have you tried running sudo /usr/sbin/mysqld --skip-grant-tables & to give you a chance to flush privileges and set a new known root password?
by DougieLawson
Wed Jun 20, 2018 9:44 pm
Forum: Troubleshooting
Topic: Unable to fully set up phpmyadmin
Replies: 19
Views: 324

Re: Unable to fully set up phpmyadmin

Have you tried resetting the root password?
viewtopic.php?p=1330914#p1330795
by DougieLawson
Wed Jun 20, 2018 9:32 pm
Forum: Python
Topic: How to simultaneously send and receive data between a laptop and raspberry pi?
Replies: 4
Views: 114

Re: How to simultaneously send and receive data between a laptop and raspberry pi?

MQTT with Mosquitto or RabbitMQ is what you're looking for.
by DougieLawson
Wed Jun 20, 2018 4:25 pm
Forum: Troubleshooting
Topic: Unable to fully set up phpmyadmin
Replies: 19
Views: 324

Re: Unable to fully set up phpmyadmin

There's a trivial procedure to reset a MySQL (or MariaDB) root password.

https://help.ubuntu.com/community/MysqlPasswordReset
by DougieLawson
Wed Jun 20, 2018 6:27 am
Forum: Troubleshooting
Topic: Unable to fully set up phpmyadmin
Replies: 19
Views: 324

Re: Unable to fully set up phpmyadmin

From a command line run mysql -u root mysql CREATE USER 'phpa'@'localhost' IDENTIFIED BY 'some_strong_password'; GRANT ALL PRIVILEGES ON *.* TO 'phpa'@'localhost' WITH GRANT OPTION; CREATE USER 'phpa'@'%' IDENTIFIED BY 'some_strong_password'; GRANT ALL PRIVILEGES ON *.* TO 'phpa'@'%' WITH GRANT OPTI...
by DougieLawson
Tue Jun 19, 2018 7:26 pm
Forum: Official Foundation Display
Topic: Raspberry Pi 7inch Touchscreen not working
Replies: 12
Views: 544

Re: Raspberry Pi 7inch Touchscreen not working

If you have an active 7" touch screen you can't have an active HDMI display. It's one or the other with the standard display drivers.
by DougieLawson
Tue Jun 19, 2018 6:21 pm
Forum: Troubleshooting
Topic: Wrong screen resolution of Raspbian in VNC Viewer
Replies: 5
Views: 141

Re: Wrong screen resolution of Raspbian in VNC Viewer

Start with a ls -la /sys/module/bcm2708_fb/parameters command. It should be obvious what I'm showing you.
by DougieLawson
Mon Jun 18, 2018 9:13 pm
Forum: Add-ons
Topic: [solved]thermal paste to get heat sink on cpu?
Replies: 5
Views: 139

Re: thermal paste to get heat sink on cpu?

A heatsink on a Zero is a waste of effort because it's next to impossible to get it running hot. A heatsink on a 3B+ may not be needed as the termal conduction of the CPU package and circuit board are an order of magnitude better than earlier models.
by DougieLawson
Mon Jun 18, 2018 8:45 pm
Forum: Add-ons
Topic: [solved]thermal paste to get heat sink on cpu?
Replies: 5
Views: 139

Re: thermal paste to get heat sink on cpu?

What model of Raspberry do you have and why do you think you need a heatsink?
by DougieLawson
Mon Jun 18, 2018 8:44 pm
Forum: Beginners
Topic: Access denied on SHH (password is correct, user is pi)
Replies: 15
Views: 397

Re: Access denied on SHH (password is correct, user is pi)

Easiest way to fix a broken password is to boot to an emergency root shell. If NOOBS use the recovery system to add systemd.unit=rescue.target to /boot/cmdline If PINN use the PINN password reset option in the PINN recovery system. No mucking about needed. If plain Raspbian, pull the card, edit F:\c...
by DougieLawson
Mon Jun 18, 2018 8:38 pm
Forum: General discussion
Topic: recent serial i/o tutorial
Replies: 11
Views: 318

Re: recent serial i/o tutorial

The RPi has five SPI CS lines between the two devices /dev/spidev0.0 /dev/spidev0.1 /dev/spidev1.0 /dev/spidev1.1 & /dev/spidev1.2 https://pinout.xyz/pinout/spi spidev0 == GPIO7 (CE0.1), GPIO8 (CE0.0), GPIO9 (MISO0), GPIO10 (MOSI0) & GPIO11 (SCLK0) spidev1 == GPIO 16 (CE1.2), GPIO17(CE1.1), GPIO18 (...
by DougieLawson
Mon Jun 18, 2018 5:37 pm
Forum: Python
Topic: Tripple button activated stopwatch
Replies: 7
Views: 269

Re: Tripple button activated stopwatch

gordon77 wrote:
Mon Jun 18, 2018 4:39 pm
Here's an example that might get you started...

viewtopic.php?t=204237
We've done that bit.

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