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by Douglas6
Mon Sep 16, 2019 12:03 am
Forum: Beginners
Topic: Soldering
Replies: 20
Views: 406

Re: Soldering

LTolledo wrote:
Sun Sep 15, 2019 11:38 pm
picture posted for soldering reference only:
Is that your own work? Artful. A lost art, I fear.
by Douglas6
Sun Sep 15, 2019 11:14 pm
Forum: Beginners
Topic: Soldering
Replies: 20
Views: 406

Re: Soldering

You can connect pads on a perfboard with insulated wire (two pads), or uninsulated wire (multiple pads) flat against the bottom side of the perf. I like to use the severed leads of a resistor, LED, etc. With a little practice, it can be very neat. Or, you can create solder bridges between adjacent p...
by Douglas6
Sat Sep 14, 2019 4:59 pm
Forum: General discussion
Topic: Raspberry PI 4 and battery
Replies: 5
Views: 241

Re: Raspberry PI 4 and battery

W. H. Heydt wrote:
Sat Sep 14, 2019 4:44 pm
Certainly. What other constraints do you have, such as "is it reasonably portable"?
Or:
"How long will it last?"
"Is additional hardware required?"
"Is it prone to catching fire?"
"Can it be recharged? How?"
by Douglas6
Sat Sep 14, 2019 1:18 am
Forum: Troubleshooting
Topic: Set bluetooth audio as default output
Replies: 1
Views: 76

Re: Set bluetooth audio as default output

See this post: https://www.raspberrypi.org/forums/view ... c#p1344830. Don't worry about connecting, BlueALSA will do that for you.
by Douglas6
Fri Sep 13, 2019 8:25 pm
Forum: Graphics, sound and multimedia
Topic: Bluetooth Headset not working on RPi4B
Replies: 5
Views: 186

Re: Bluetooth Headset not working on RPi4B

I'm afraid I have nothing to say regarding an Arch distro. I tend to stick with Raspbian, and I would not use PulseAudio, Blueman, or alarm-bluetooth-raspberrypi (whatever that does). The standard Raspbian comes with everything you need for Bluetooth streaming audio, and in my experience, it works q...
by Douglas6
Fri Sep 13, 2019 6:00 pm
Forum: Beginners
Topic: pi zero w and aptx
Replies: 2
Views: 115

Re: pi zero w and aptx

I'm not certain that aptX is down to the hardware alone (or at all); it must also be supported in software. I don't believe aptX is included with the BlueALSA version in the repo; it may need to be compiled in. The Pi won't 'get confused' with multiple Bluetooth adapters, they will be numbered hci0,...
by Douglas6
Fri Sep 13, 2019 3:34 pm
Forum: Graphics, sound and multimedia
Topic: Bluetooth Headset not working on RPi4B
Replies: 5
Views: 186

Re: Bluetooth Headset not working on RPi4B

I have not heard of any complaints regarding audio streaming on the Pi4. I have not tried streaming from my Pi4, but I have tested streaming TO it, and it's been working fine. I doubt if it's due to a module mismatch. You didn't mention much about your system. You're not using PulseAudio, are you? B...
by Douglas6
Fri Sep 13, 2019 10:19 am
Forum: Graphics, sound and multimedia
Topic: omxplayer + Bluetooth = new problems... need some help
Replies: 5
Views: 105

Re: omxplayer + Bluetooth = new problems... need some help

I'm afraid I'm not familiar with radios apart from WiFi and Bluetooth. I can't think of any advantage using a different frequency would have.
by Douglas6
Thu Sep 12, 2019 11:00 pm
Forum: Graphics, sound and multimedia
Topic: omxplayer + Bluetooth = new problems... need some help
Replies: 5
Views: 105

Re: omxplayer + Bluetooth = new problems... need some help

1. how can I make the player to play the file instantly just like when using wired speakers? You can't. Bluetooth streaming will always exhibit more latency than a wired connection. That's just Bluetooth. One second latency sounds a little extreme, but I would be surprised if you can cut it down to...
by Douglas6
Thu Sep 12, 2019 12:30 pm
Forum: General discussion
Topic: Steps to setup the communication of rasp pi 3 with hm-10 installed on tm4c microcontroller
Replies: 1
Views: 36

Re: Steps to setup the communication of rasp pi 3 with hm-10 installed on tm4c microcontroller

First step is to see if the Pi recognizes the HM-10. Use the bluetoothctl command 'scan' to see if the device is recognized. If so, you can use bluetoothctl or gatttool to connect and read or write characteristics. That's assuming you have a valid BLE service and advertising running on the TM4C. You...
by Douglas6
Wed Sep 11, 2019 9:43 pm
Forum: Off topic discussion
Topic: [Solved] Very busy today?
Replies: 23
Views: 1287

Re: Very busy today?

pcmanbob wrote:
Wed Sep 11, 2019 9:30 pm
Seems particularly bad this evening.
Ditto.
by Douglas6
Wed Sep 11, 2019 1:07 am
Forum: Troubleshooting
Topic: STICKY: Bluetooth not working after update - need info
Replies: 167
Views: 161059

Re: STICKY: Bluetooth not working after update - need info

Your post would be much more helpful and informative if you mentioned what you "have been tweaking and changing parameters for days". Also what you mean by "Rpi 4b's Wifi/BT module". "Sleeping mode" I'll just ignore for now.
by Douglas6
Mon Sep 09, 2019 3:24 pm
Forum: General discussion
Topic: How to make money with a Raspberry Pi?
Replies: 40
Views: 1625

Re: How to make money with a Raspberry Pi?

1. Learn how to program on the Pi.
2. Get a job.
by Douglas6
Mon Sep 09, 2019 1:38 pm
Forum: Beginners
Topic: Bluetooth Data Logging Project
Replies: 3
Views: 78

Re: Bluetooth Data Logging Project

No problem communicating between a Pi and an HC-05, although BLE is not an option.

However, from what I can see, communications between an ADXL345 and an HC-05 may be a problem. I notice Adafruit has an ADXL345 breakout board, but only with I2C / SPI interfaces. The HC-05 requires a serial interface.
by Douglas6
Sun Sep 01, 2019 12:27 pm
Forum: Troubleshooting
Topic: Connect to BT device after it is turned on, or reconnect if it goes off then on
Replies: 3
Views: 111

Re: Connect to BT device after it is turned on, or reconnect if it goes off then on

Not that I am aware of. There is nothing magic about Bluetooth; such that two devices intrinsically know when they are close and active. If one device goes out of range, start looping again.
by Douglas6
Sat Aug 31, 2019 11:41 am
Forum: Troubleshooting
Topic: Connect to BT device after it is turned on, or reconnect if it goes off then on
Replies: 3
Views: 111

Re: Connect to BT device after it is turned on, or reconnect if it goes off then on

Rfcomm will only connect when told to, via 'rfcomm connect'. You could put that command in a loop, and try to connect periodically, until successful.
by Douglas6
Fri Aug 30, 2019 11:34 am
Forum: Beginners
Topic: Raspberry Pi, Bluetooth Beacon Project. IoT.
Replies: 2
Views: 143

Re: Raspberry Pi, Bluetooth Beacon Project. IoT.

A Google for 'Raspberry Pi beacon presence detection' brings up quite a few.
by Douglas6
Thu Aug 29, 2019 8:38 pm
Forum: Troubleshooting
Topic: Cant get bluetooth to work. RPI 2b
Replies: 3
Views: 144

Re: Cant get bluetooth to work. RPI 2b

Having taken a look at the Esperanza EA159, I double down on my previous recommendation. It's a cheap, no-name dongle with no chipset specified, and support only for Windows mentioned. If you can't bring the dongle up, there's nothing you can do with it (including pairing). Try to find a dongle usin...
by Douglas6
Thu Aug 29, 2019 7:58 pm
Forum: Troubleshooting
Topic: Cant get bluetooth to work. RPI 2b
Replies: 3
Views: 144

Re: Cant get bluetooth to work. RPI 2b

Try:
sudo hciconfig hci0 up

[EDIT: I see now you are running as root; nevermind.

I believe I've seen that "Operation not supported (95)" error before, and it was the result of a bum dongle (it happens). Can you try a different dongle, preferably one that costs more than a dollar or two?]
by Douglas6
Wed Aug 28, 2019 7:05 pm
Forum: Python
Topic: Bluetooth RSSI
Replies: 6
Views: 257

Re: Bluetooth RSSI

Code: Select all

from bluepy.btle import Scanner
 
scanner = Scanner()
devices = scanner.scan(10.0)
 
for device in devices:
    if device.addr == "XX:XX:XX:XX:XX:XX" :
        # Do something 
by Douglas6
Wed Aug 28, 2019 2:39 pm
Forum: Python
Topic: Bluetooth RSSI
Replies: 6
Views: 257

Re: Bluetooth RSSI

Bluepy will allow you to connect with a BLE device.

You should probably research BLE. 'Paired' and 'trusted' are classic Bluetooth terms that have no real relevance with BLE.
by Douglas6
Tue Aug 27, 2019 6:22 pm
Forum: Python
Topic: Bluetooth RSSI
Replies: 6
Views: 257

Re: Bluetooth RSSI

Should be pretty simple using the bluepy Python library. First, install bluepy (https://github.com/IanHarvey/bluepy). The following code will scan for ten seconds, and then print the RSSI for all BLE devices it found: from bluepy.btle import Scanner scanner = Scanner() devices = scanner.scan(10.0) f...
by Douglas6
Mon Aug 26, 2019 1:30 pm
Forum: Troubleshooting
Topic: Raspberry Pi Zero w as bluetooth transmitter
Replies: 2
Views: 117

Re: Raspberry Pi Zero w as bluetooth transmitter

What is 'sabluealsa'? I've never heard of it, and neither has Google, and neither has your Pi, unsurprisingly.
by Douglas6
Fri Aug 23, 2019 11:49 pm
Forum: Off topic discussion
Topic: Solder Question
Replies: 13
Views: 1226

Re: Solder Question

There are two main techniques for stained glass; lead cames, which use solid lead-alloy 'i-beams' that are soldered at the joints, like in church windows and other windows. Then there is copper foil stained glass, mainly used by hobbyists, or for lampshades, in which the glass is wrapped in copper f...
by Douglas6
Fri Aug 23, 2019 10:09 pm
Forum: Troubleshooting
Topic: Problem Transferring File from Raspberry Pi 3B to Android Phone via Bluetooth
Replies: 2
Views: 103

Re: Problem Transferring File from Raspberry Pi 3B to Android Phone via Bluetooth

Are you trying to connect thru bluetoothctl? If so, ignore any errors. As long as the devices are paired, try the ussp-push command. It will make the connection.

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