To me it seems a lot easier to connect the pi outside your existing relay - essentially making the pi work as just another switch in parallel with the other ones on the circuit you want to control.
This way you can use your existing bi-polar relay board.
simulate this circuit – Schematic created using CircuitLab
This will save you the trouble of ...
Circuit that use the system of low voltage push buttons and latching relays usually come with a transformer or small power supply, e.g. 5V DC or 12V DC (but other voltages are also not uncommon such as 24V as pointed out by the edited question). There are also models available with low or high pulse trigger, that is, the push buttons are either providing a ...
Are you planning to create an app or use some messenger to talk to the device. Say for example you can use xmpp to pass messages to your device and give triggers.
You can use light weight protocols like MQTT with Mosqitto broker to accomplish the process of talking to raspberry pi.
However if you are are looking to create an app and then talk to your ...
How I understand, you have an issue with a special character ("apostrophe") in the SSID. Probably "Yourname's iPhone". The easiest way is to change the broadcasted SSID in your iPhones "Personal Hotspot" Settings.
If this is no option, try to escape the apostrophe on your RPI settings:
General setup for WIFI from this site:
Firstly, I would recommend using a power supply like this as power banks run out of battery (of course) and this could be annoying. Secondly if you are starting of with Pi I would not recommend using IPhone screens as although you can do it it is difficult. To use an old monitor you may need a HDMI to DVI cable like this.
Hope this helps.
You power bank will work (with the 2.1 Amp output), but it may not work for continuous operation. Not all power banks can charge while supplying power. Also undervoltage is the source of numerous problems (e.g. SD card corruption, networking issues, freeze ups). As a result I would suggest getting a power adapter (the recommendation is for 5 Volts 2.5 Amps), ...
Not that this is helpful, because it doesn't work for streaming from the phone running iOS 10, but it does work for streaming from iTunes on macOS Sierra and iTunes 220.127.116.11.
Here is what I did after scouring the web for a while:
Enable audio jack:
sudo amixer cset numid=3 1
Get the latest updates:
sudo apt-get update
sudo apt-get upgrade
One way would be to pre-configure the RPi to connect to AP called e.g. AndroidAP with no password (or a known password), then instruct the user to activate such AP on their smartphone. This requires the smartphone to support connection sharing (which most modern devices do) and is not that great security-wise, but it's an option. Here's how to do it.
Is it possible to make a terminal app that uses an HDMI output source?
Of course, but I think what you mean is input source. No, the HDMI cannot be used for input.
I want to do it without network,
I think you mean without the internet or other nodes. The simplest way in that case would just be to set up the pi as an "access point" even though it is ...