this is a mini project were we can choose the project with these types of constraints so when we looked for project ideas we noticed the problem with this electric bell
Do we understand correctly that there is NO common point where all the bells can be turned on/off with one switch? How long will wires need to be to connect your project to all the bells? Or are you going to put ONE Arduino controller near EACH of the bells?
How far the four building are located from each other? Are they located in line or in circle?
4 buildings are located in a circle but there is a distance there of around 1km range using wired way is not at all feasible and another building is far from below 1km range
yeah im thinking about one controller for one bell like that.I thinked about making by 1 transmitter and receivers for each bell idea using a rf transceiver but as the all the bells are very inside the buildings it is also not at all usefull.
Due you have internet connectivity in all four buildings with their respective routers?
yes we have the same internet connection with routers for each buildings
Do I understand that one of your constraints is that you have to use all the microcontroller pins?
That would probably limit you to a microcontroller with 8 pins. is there any constraint as to how many pins the WiFi module can have? Many WiFi modules would have enough intelligence to be used as the microcontroller.
You need to explain more about the rules and their implications. Are the rules posted? If they are then post them here.
I didn't mean that if I chose a microcontroller with 20 pins where there is only the need for 10 pins and there is an alternative option with the same features with 10 pins out of 10 pins 6 were utilized so that would be a better option that's what I mean
Then it sounds like one of the ESP8266 modules would be appropriate.
only that esp8266 are wifi modules right then I need to write the code to a microcontroller for ringing the bell or buzzer at the specific time as per the code that's where I get stuck for choosing a suitable microcontroller as it should not be too costly and should be able to implement this project smoothly also cant choose the very low-cost microcontroller as maybe it will not be able to handle the code or will have less memory or performance that's also a concern.
There are already 30 posts. Now, it is the time that you collect a 30-pin ESP32 Dev Module (fig-1) or a 32-pin ESP32S2 Mini Dev Module (Fig-2, preferred) and learn how to get local time from NTP Server and show it on Serial Monitor. After that take the remaining issues one at a time and solve. Finally, make your own schematic, create layout, make PCB, intstall hardware/software components, and then make a show.
Figure-1:
Figure-2:
I'd call them microcontrollers with WiFi. I've used them for projects that just need a few GPIO pins and had enough memory to host a small web page for the user interface.
if you want small and limited number of pins, I would get a few XIAO ESP32C3.
They come cheap and are pretty small (21 x 17,5 mm) and you have WiFi 2,4 GHz + Bluetooth 5.0 and can connect and external WiFi antenna through an uFL connector
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