Raspberry Pi Forums

FlyingDrMike

Level shifters do not solve the problem as they still require the slave to sink the masters pull-up current. I did get it to work using a 2N3906 PNP transistor - 4k7 base to emitter resistor, collector to ground, emitter to Pi SDA, and base to PT2314 SDA. This uses the current gain of the transistor...

FlyingDrMike

I hope these comments/analysis help/explain. I had no problems driving a PT2314 on a JBL on-time direct. However these modules (from ebay/Banggood) do not work. The problem with the modules relates to their ability to pull the data line low to give the ACK I2C notification. The chips on the two modu...

FlyingDrMike

The Pi can output pictures up to full HD - that look great on a TV. I have written an instructable on a simple ( and all free software/firmware) that uses one of the pi screensavers to randomly show pictures from a designated folder. Pictures can be loaded over WiFi using a ftp program from PC or ev...

FlyingDrMike

For a detailed description of how to set up an internet radio and music player with smartphone (webpage) control and HQ audio via a PCM5102A DAC see: https://www.instructables.com/id/High-Q ... dio-With-/

FlyingDrMike

For a detailed description of how to set up an internet radio and music player with smartphone (webpage) control and HQ audio via a PCM5102A DAC see: https://www.instructables.com/id/High-Q ... dio-With-/

FlyingDrMike

My target is a looping video that I can pause/restart (from where paused) via a GPIO. I have the pause part working but it is not restarting. I am editing the video.c file and am using wiringPi for the GPIO. In order to loop I replaced 'break' with 'rewind(in)' after the if(!data_len) so this now lo...

FlyingDrMike

Is there some way to enable text to speech on Chromium? I am using the Node-RED dashboard audio out node. It delivers audio when viewed on my PC or Android phone but on the Pi I get a dialogue box appear for a couple of seconds showing " Computer says... x" where x is the payload sent to t...

FlyingDrMike

Sorted:

Code: Select all

sudo n 8.9.0

sudo shutdown -r now

installs v8.9.0

and (being thorough):

Code: Select all

sudo n rm 9.0.0

removes the 9.0.0 install files.

FlyingDrMike

Node.js was updated to 9.0.0 2 days ago and this version is not compatible with the latest npm (5.5.1). A solution was posted on https://github.com/npm/npm/issues/19019#issuecomment-340940842 suggesting: by downgrading to npm@5.3.x: [sudo] npm install -g npm@5.3.x This failed with error saying npm n...

FlyingDrMike

Has anyone managed to rotate the Waveshare (1024x600) 7" HDMI capacitive touchscreen 90 or 127 deg? The screen will rotate using display_rotate = 1 or 3. The touchscreen driver is their own. Hence the 90 deg rotate solutions on this forum do not seem appropriate. I contacted Waveshare and they ...

FlyingDrMike

I have now loaded Mosquitto on both Jessie and Stretch. In the case of Jessie I used the following code before install: sudo wget http://repo.mosquitto.org/debian/mosquitto-repo.gpg.key sudo apt-key add mosquitto-repo.gpg.key cd /etc/apt/sources.list.d sudo wget http://repo.mosquitto.org/debian/mosq...

FlyingDrMike

I overcame this problem by copying the files via my PC. I realised that at least one of the three files already existed and did not need changing. Hence I would check for the file by trying to edit it first, then create it if it does not exist, and then edit it and paste the contents from my PC. So ...

FlyingDrMike

I am trying to set up autostart for Node Red and am following their advice from https://nodered.org/docs/hardware/raspberrypi I am getting a GnuTLS error - Unable to establish SSL connection when I execute the wget command: pi@MyIoT:~ $ sudo wget https://raw.githubusercontent.com/node-red/raspbian-d...

FlyingDrMike

Sorry I have had enough getting nowhere. I have gone back to square one, loaded jessie and am now able to do coms from mosquitto to an ESP loaded with Sonoff-Tasmota so I can concentrate on IoT rather than Linux. It is time for someone else to take up the mantle of getting mosquitto on Stretch. When...

FlyingDrMike

I am not convinced the install after editing the dependency file has worked. First I have a Sonoff switch with the Tasmoda firmware loaded and logged on to my network. It reports: 14:00:26 MQT: Attempting connection... 14:00:27 DNS: Query done. MQTT services found 0 I then checked mosquito was runni...

FlyingDrMike

Success - but a bit of a bumpy ride! I hope the trail below will useful to others to also get mosquito working on Stretch. However a couple of points: I wget the version 1.14.12 as this is what was showing as Candidate earlier. The .deb file was downloaded to root so I did not need the mosquitto/mos...

FlyingDrMike

Thank you for your quick reply. I will give this a go, and also change the libwebsockets dependency from 3 to 8. For reference my error messages were: pi@home:/etc/apt/sources.list.d $ sudo apt-get install mosquitto Reading package lists... Done Building dependency tree Reading state information... ...

FlyingDrMike

Dear all I have the identical problem as the first posting here. This is on a clean install of Raspbian Stretch. The only software loaded beforehand was NodeRed. I used: sudo wget http://repo.mosquitto.org/debian/mosquitto-stretch.list. I looked at Aptitude but was not sure if either of the referenc...

Search found 18 matches

Re: unable to detect pt2314 i2c device

Re: unable to detect pt2314 i2c device

Re: Digital Frame

Re: Internet Radio and MP3 Player

Re: Internet radio

hello_video play/pause via GPIO

Chromium text to speech

Re: Downgrade node.js from v9.0.0

Downgrade node.js from v9.0.0 [SOLVED]

Rotate Waveshare 7" Capacitive Touchscreen 90 or 270deg

Re: STRECH and MQTT

Re: wget GnuTLS error - Unable to establish SSL connection

wget GnuTLS error - Unable to establish SSL connection

Re: STRECH and MQTT

Re: STRECH and MQTT

Re: STRECH and MQTT

Re: STRECH and MQTT

Re: STRECH and MQTT