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by brandoncheah
Fri Aug 23, 2019 4:36 am
Forum: Advanced users
Topic: Speech Recognition with i2S microphone
Replies: 1
Views: 171

Re: Speech Recognition with i2S microphone

*Update* I think i found out what is going wrong, it might be Pyaudio microphone selection. I've tried to record using PyAudio library, where I've specified the index number, when chosing index number 3 4 5, the sound recorded is very soft and hard to listen, that is why the voice recognition couldn...
by brandoncheah
Thu Aug 22, 2019 3:36 am
Forum: Advanced users
Topic: Speech Recognition with i2S microphone
Replies: 1
Views: 171

Speech Recognition with i2S microphone

Currently working on RPi 3B+, Raspbian Buster. Installed speech recognition library: https://pypi.org/project/SpeechRecognition/ Hardware setup for audio and microphone: Audio Amp: MAX98357 (i2S) Microphone: SPH0645LM4H (i2S) Followed the guide on : https://www.hackster.io/maremoto/snips-assistant-f...
by brandoncheah
Mon Jul 29, 2019 8:54 am
Forum: Networking and servers
Topic: Expose FLASK web server API to the internet
Replies: 2
Views: 130

Expose FLASK web server API to the internet

I've created RESTful API using Flask and I can access the API in local network. In order for any network to access this API, I understand I need to expose this Flask web server to the internet. I would not like to configure port forwarding on my router, so this method is put aside. I tried using NGR...
by brandoncheah
Tue Jul 02, 2019 3:32 am
Forum: Troubleshooting
Topic: I2S mems microphone (SPH0645LM4H) installation issue : __sanitizer_cov_trace_pc
Replies: 1
Views: 362

Re: I2S mems microphone (SPH0645LM4H) installation issue : __sanitizer_cov_trace_pc

Hi, I have also the same issue during (make -C /lib/modules/$(uname -r )/build M=$(pwd) modules) step:
WARNING "__sanitizer_cov_trace_pc" [/home/pi/rpi-i2s-audio/my_loader.ko] undefined!

Anybody know what's going on?
by brandoncheah
Thu May 02, 2019 10:09 am
Forum: Advanced users
Topic: MQ Gas sensor wire connection
Replies: 3
Views: 337

MQ Gas sensor wire connection

I've connected my circuit as shown in the diagram I have one issue which I am concern about the Analog Output from the Gas sensor is 0-5V, is it fine to connect to the MCP3008 ADC A0 pin? I've read online, some guides says it's Ok to straight connect, some says need to regulate the voltage to 3.3V A...
by brandoncheah
Fri Apr 26, 2019 5:58 am
Forum: Advanced users
Topic: LM386 Audio Amp Module Producing buzzing/cracking noise
Replies: 6
Views: 584

LM386 Audio Amp Module Producing buzzing/cracking noise

I've connected my circuit as you can see in the image below: LM386 module: https://www.lelong.com.my/lm386-chip-20-gain-audio-amplifier-module-sgrobot-196954225-2020-09-Sale-P.htm It produces white noise, cracking/buzzing when its connected to the 5V and GND GPIO pins on the RPi I've tried to use an...
by brandoncheah
Sat Mar 02, 2019 2:27 am
Forum: Advanced users
Topic: Linphone console application Segmentation fault
Replies: 2
Views: 322

Re: Linphone console application Segmentation fault

I couldn't confirm that whether this is expected/normal, because sometimes this error pops out and sometimes it doesn't.
Besides, even though previously this errors appears, I am still able to dial outgoing calls without any problem, therefore I always ignore these errors
by brandoncheah
Fri Mar 01, 2019 9:12 am
Forum: Advanced users
Topic: Linphone console application Segmentation fault
Replies: 2
Views: 322

Linphone console application Segmentation fault

I've been using linphone console application (linphonec) in the RPi 3 B+ and it works fine until yesterday, when an outgoing call is being dialed for about 2seconds, it shows segmentation fault and exits the console application. tried to debug using gdb and I get the following messages: gdb ./linpho...
by brandoncheah
Fri Mar 01, 2019 6:35 am
Forum: Advanced users
Topic: LiPo Battery for Raspberry Pi Zero W
Replies: 6
Views: 1452

Re: LiPo Battery for Raspberry Pi Zero W

Thanks for the advice, I have another quick question. Is there any alternatives to this module from Adafruit, Powerboost 1000C: https://learn.adafruit.com/adafruit-powerboost-1000c-load-share-usb-charge-boost/overview It looks like this module can solve most of my problem which are: 1. Charging and ...
by brandoncheah
Thu Feb 28, 2019 1:58 am
Forum: Advanced users
Topic: LiPo Battery for Raspberry Pi Zero W
Replies: 6
Views: 1452

Re: LiPo Battery for Raspberry Pi Zero W

I've connected the circuit (image in the attachments), isit normal for the charger module protection to heat up when I am charging the battery? Because when I charge the battery the charger module protection became so hot and I am afraid it would blow up or something. I am using normal copper wires ...
by brandoncheah
Tue Feb 26, 2019 3:59 am
Forum: Advanced users
Topic: problem with linphone
Replies: 6
Views: 1099

Re: problem with linphone

Go to your /home/pi folder and show hidden files, then copy "linphone.db" file and paste into /home/pi/.local/share/linphone
by brandoncheah
Mon Feb 18, 2019 5:04 am
Forum: Advanced users
Topic: LiPo Battery for Raspberry Pi Zero W
Replies: 6
Views: 1452

LiPo Battery for Raspberry Pi Zero W

I want to power my RPi Zero W with a battery pack (1300mAh, 3.7V). Can somebody tell me whether this setup is correct as I don't want to damage my Raspberry Pi. I will be using a Protection & charging board TP4056 and a MT3608 Step-Up Boost converter. The battery pack will connect to TP4056, TP4056 ...
by brandoncheah
Thu Dec 13, 2018 8:01 am
Forum: Advanced users
Topic: Huawei E173 3G Dongle GSM calls
Replies: 1
Views: 367

Huawei E173 3G Dongle GSM calls

I have a Huawei E173 3G dongle up and working fine and is able to connect 3G internet via sakis3G and UMTSKeeper, able to send and receive SMS. However, the AT command (ATD) for dialing another phone number keeps giving me ERROR, I've tried ATD****, ATD*****; ATDT****, where all gives me the same ER...
by brandoncheah
Thu Nov 29, 2018 6:51 am
Forum: Advanced users
Topic: Prioritizing Wi-Fi (wlan0) over 3G USB Dongle (ppp0) internet connectivity
Replies: 2
Views: 1021

Re: Prioritizing Wi-Fi (wlan0) over 3G USB Dongle (ppp0) internet connectivity

I think this is what you need. ip route show ip route del default ip route add default via 192.168.1.1 dev wlan0 Just change device to wlan0 / eth0 or which ever interface you want to use and set the IP address to be the gateway of that network interface. FYI It's not permanent, meaning you'd have ...
by brandoncheah
Wed Nov 28, 2018 9:31 am
Forum: Advanced users
Topic: Prioritizing Wi-Fi (wlan0) over 3G USB Dongle (ppp0) internet connectivity
Replies: 2
Views: 1021

Prioritizing Wi-Fi (wlan0) over 3G USB Dongle (ppp0) internet connectivity

I just bought a 3G USB Dongle (Huawei E173) and successfully configured it to have 3G internet connection using sakis3G and also UMTSkeeper to keep my 3G connection alive whenever any 3G disconnection happens. I have both 3G and Wi-Fi connected at the same time. I want to only use 3G connection only...
by brandoncheah
Thu Oct 25, 2018 1:29 am
Forum: Advanced users
Topic: Automate Google Hangouts in Raspberry Pi?
Replies: 3
Views: 1658

Re: Automate Google Hangouts in Raspberry Pi?

Yes, I've tested it out on the chromium browser at "hangouts.google.com" and it works It is very laggy and delay about 5~10seconds I was wondering if there is any method to use google hangouts without using the chromium browser version? I mean like a google hangout console application for python/RPi...
by brandoncheah
Wed Oct 24, 2018 4:00 am
Forum: Advanced users
Topic: Automate Google Hangouts in Raspberry Pi?
Replies: 3
Views: 1658

Automate Google Hangouts in Raspberry Pi?

I am thinking of initiating a video call to a user using Google Hangouts when a button is pressed.

Is there any way to automate Google Hangouts video calling in RPi 3?
by brandoncheah
Wed Oct 24, 2018 3:10 am
Forum: Graphics, sound and multimedia
Topic: Linphone / USB sound card / Echo cancellation
Replies: 5
Views: 4292

Re: Linphone / USB sound card / Echo cancellation

Hi, I also have the same problem where I can hear back my own voice on my phone. I have an external speaker and microphone connected to the RPi using a USB sound card. What I see now is the output audio that the speaker produces is going back into the microphone beside it, therefore I'm hearing back...
by brandoncheah
Fri Oct 05, 2018 5:59 am
Forum: Advanced users
Topic: Couldn't connect to Linphone sip server
Replies: 3
Views: 660

Re: Couldn't connect to Linphone sip server

Thank you for the replies, but I've already solved the problem. Thank you :)
by brandoncheah
Thu Sep 27, 2018 9:59 am
Forum: Advanced users
Topic: Couldn't connect to Linphone sip server
Replies: 3
Views: 660

Couldn't connect to Linphone sip server

I've compiled and installed Linphone console application and follow the steps in the Linphone wiki website: https://wiki.linphone.org/xwiki/wiki/public/view/Linphone/Linphone%20and%20Raspberry%20Pi/ After entering the console application linphonec>> I've added a proxy into the console application bu...

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