I'm doing simple home security Iot project in which I want to connect esp32 camera module CamWebServer example to firebase Database, and then connect to Android app. Or at least I want to give a link in the app.
I want to give it a remote access. Plus I don't want esp32 cam to depend on home Wi-Fi, I want to depend it on Hotspot module(Is there any type of module available? If it is then please tell me), So it can have it's own internet like mobile has mobile data.
For example if intruder breaks electricity of home, esp32 cam still be accessed.
Can I do that?
Any type of help is welcomed!!
Thanks for the help!
Related
I want to know how to send out an advertisement with some specific user number and data such that a connection can be established using the the sdk 15.3.0.
could anyone suggest me what changes i need to make in the ble app beacon code given in the sdk examples.
Thanks
One idea would be to start with the ble_peripheral example of the Nordic SDK.
You can find the following two guides on their forum : https://devzone.nordicsemi.com/nordic/short-range-guides/b/bluetooth-low-energy/posts/ble-services-a-beginners-tutorial and https://devzone.nordicsemi.com/nordic/short-range-guides/b/bluetooth-low-energy/posts/ble-characteristics-a-beginners-tutorial
This explains how to build a custom service with a custom characteristic to handle read / write and notification of values from the embedded device to a BLE central device (e.g: smartphone).
we are doing a project on image processing using a camera,raspberry pi3 and a gsm module. Above mentioned things are with a flying drone. I can send a notification message to a mobile using gsm module if required object detected on the cam. But we store that image to view on a webpage or through a mobile app easily. while it's flying it can't connect to the internet. So can you suggest a solution to get those images when it is inside our home wifi range.(any how we can get the images from sd card but i need to get those as soon as possible it detected the wifi) . Thanks in advance
You could consider using "tethering", a.k.a. "Personal Hotspot" in Apple parlance, on your mobile phone.
Basically, you would enable the Personal Hotspot on your iPhone and allow your RPi to connect to it via Wifi. You would have to check your setup, but my iPhone takes IP address 172.20.10.1 for itself and dishes out IP addresses to clients which are the same but with the 1 replaced by a small number under 13.
You can see from here how to setup your RPi to automagically connect to your Hotspot whenever in range. You could also consider fixing a static IP address when on that network, so you know where the RPi will show up for sure.
You would then ensure that Apache, or maybe lighttpd which is lighter weight, is running on your RPi.
Then, your app on the RPi would store its image as image.jpg in Apache's DOCUMENT_ROOT directory, probably /var/www/html/image.jpg but check.
Now, on the iPhone, start Safari and browse to:
http://172.20.10.N/image.jpg
where N is a small number. You should see your image and be able to save it to DropBox or Photos or iCloud Drive for others to see.
Of course, once your RPi is connected to your iPhone's hotspot, it can FTP or ssh copy the image to any website or other server on the Internet it has access to itself.
I have understood your question also I have cheapest solution to build your project. you will be needing 3 modules
ESP8266 (Wifi module)
SD card logger
Camera module(go with your choice, try ESP8266(But I have not tried it))
Combining all these can get your work done. But most instructing part is When connected with wifi it should transmit video to webpage or app and when not connected should log video to SD card
Below is my try to solve your problem, if you have any doubts feel free to ask your question.
ESP8266 is an WiFi module, you can connect it with an hot-spot or an router, similar to any WiFi device's on successful connection it throws 200,OK failing will throw 404 or so. Technically just like any TCP devices it will work. You can connect, disconnect, send and receive data continuously using software(using code you write).
0-code for camera unit starts
1-try connecting WiFi && start the camera and start logging into SD card //InCase if WiFi module takes longer time than usual to connect, this will prevent data from losing
2-if connection failed - continue writing to SD card
3-else(connection made) - start streaming the data && stop the SD card logging and save the file and create a new empty file so that we can save on next connection out without wasting data.
4-check for connection status in regular interval (goto step2).
5-on any external inputs(like click an image)
most important thing: code for your camera interface should work independent from the flight controller code.
-NandhaFrost
I bought one of these:
https://www.aliexpress.com/item/Smart-finder-Key-finder-Wireless-Bluetooth-Tracker-Anti-lost-alarm-Smart-Tag-Child-Bag-Pet-GPS/32806261079.html
As far as I can tell it is a BLE (Bluetooth Low Energy) location tag.
I downloaded the app for it onto my iphone, and the app instantly recognised it and connected to it. The iPhone app seems to know how far away the tag is - it has a little map of the local area and says how many feet away. I was able to set the device name via the app, but I'm not sure if that set it locally or on the tag itself. The iPhone app also has a "find" button - when you press it, the tag beeps.
So I want to know how I can program this thing myself. I want to be able to identify it when it is nearby, connect to it and make it beep. I've searched for quite a while but not come up with much.
I'm assuming (wrongly/rightly?) that there is some general standard or approach for talking to these BLE location devices and carrying out the basic functions with them - but what is that standard - where is the documentation?
Does anyone have any idea how to program these BLE location tag devices?
BLE devices typically communicate using GATT, either using standard GATT services, or custom ones. The command to make it beep is probably implemented using a custom GATT service.
For finding out the distance to the beacon, typically the RSSI is used. This is a measure of the received power. It needs to be compared to the output power at the emitter. Usually beacons will put their output power in advertisement data, so it can be used without connecting to them. Here since the app is also able to send commands to the beacon, chances are it keeps a connection to it and has a custom GATT protocol to retrieve the output power.
Here is what I would suggest:
Read up on BLE, especially advertising and GATT. For instance read this for advertising and this for GATT. The full BLE spec is available here but should be used for reference and not introduction
Sniff the communication between your device and your phone. You can see this other answer of mine to get started
Replicate the communication protocol in you own app. For that you'll need to use your target platform's BLE libraries. For instance for iOS it is CoreBluetooth
What I want to do is have a complete control on beacon remotely through web/mobile app (RestApi). I already gone through following sites,
1)https://nectarkast.com/index.html
2)https://kontakt.io/products-and-solutions/beacon-software/
How do these site working? Are they using some custom beacons that has Wifi or network connecting functionality, any help would be really appreciable.
You need (a) a beacon with internet access or (b) a base station near those beacons with internet access and the ability to connect to them via Bluetooth to configure them.
It is also possible to build beacons using Lora, SigFox, or other IoT radio technologies that effectively gives a very low power internet connection that uses little battery.
I'm having the hardest time to get the solution of the following problem.
Main issue:
Several smartphones(up to 30) must communicate with a MCU at the same time.
System overview:
There are many rooms(each room is a cabinet that 30 people can go into), and every cabinet will have one MCU for the smartphone users.
MCU will control some device of the cabinet.
The scenario of this system is as follows:
1. The users go into the cabinet.
2. Smartphone app will recognize the MCU(or MCU will recognize the smartphone) and the MCU will send some data to the smartphone and this data will be noticed to the user.
3. User inputs some data at the smartphone app and this data will be sent to the MCU to control the cabinet device.
4. Up to 30 people can go into the cabinet at the same time and the system should handle all the users simultaneously.
I'm going to develop smartphone application and MCU firmware for this system.
My thought:
I'm thinking to use Arduino/RFduino/Raspberry Pi as MCU and I'm thinking to use Bluetooth LE/Wifi/3G as communication material.
I've tried the following solutions
1. Using bluetooth low energy on Arduino/RFduino/Raspberry Pi.
MCU will be BLE peripheral and my smartphone app will be BLE central.
But I found that a BLE peripheral can only be connected to a BLE central at the same time so I can't use this method.
2. Using wifi on Raspberry Pi
I think that Raspberry Pi can run web service and my smartphone app can communicate with the server through http.
But every time the smartphone user go into the Raspberry Pi based wifi-zone, the user should select the wifi-hotspot at the network setting if he registered this wifi already, and the user should register the wifi-hotspot if this is the first time at the wifi-zone(cabinet).
This is very inconvenient for the users so can't be used for me.
3. Using 3G network on Raspberry Pi
Unfortunately, there's no 3G signal in the cabinet so I can't use this method.
I'm looking forward your kind answer.
Any hints or comments will be welcome.
Thanks for your attention.
Thanks for your answer in advance.
Toltori Kim
Well... I'd go with wifi. And QR codes.
I'd make either a single wifi network for all the cabinets (so only one set of credentials, or even an open one - without security) and then the app can connect to the raspberries using a sort of authentication (where the credentials are written in a QR code inside the cabinet) or a wifi network for each cabinet and its credentials are written in a QR code.
I'd use the first one, maybe without security. So the user has just to go in the cabinet, connect to the common wifi, make a photo at the qr code and then can use the RPi