Externally triggered photo with smartphone

In Progress

I'm looking for a solution (Android app + suggestion for a cheap smartphone with 12MP+ camera) for taking a picture with a smartphone, controlled by an external electronic device. Whenever this device gives an input signal, the smartphone should take a photo. I want to take pictures without mechanical operation (pushing a button in order to make photo is not allowed). The input signal from the external device is 5 V carried by two wires. This input should be read in a non-mechanical way by the smartphone, e.g. using the mini-USB port. Whenever there is an input (5 V instead of 0 V), the app should take and store a photo. The smartphone should still be chargeable (if it needs the mini-USB port to charge, the charging pins of that port should be unused / unaffected).

The smartphone shouldn't be mechanically modified (e.g. drilling a hole or soldering wire to the panel is not allowed). One of the originally provided physical interface should be used (e.g. USB...). No remote controlling (via another phone) allowed, the control-signal comes from another external electronic device near the smartphone.

Requirement for the smartphone

- acquirable/orderable in Western-Europe

- resolution of the smartphone's camera at least 12MP+

- Android operating system

Nice to have:

- weather-proof

- low smartphone price

I'm looking for getting an offer for:

- developing app for making photos controlled by an external device

- choosing a low-cost smartphone with at least 12 MP+ camera, able to run the app

Skills: Android, Mobile Phone

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Project ID: #4858719

Awarded to:


Hello, we have the solution for you, please check my PM to you.

$222 USD in 1 day
(0 Reviews)

10 freelancers are bidding on average $277 for this job


Hi, this should be simple for any device with USB host. The interface for the external trigger would be a cheap ($3 max) USB to serial converter attached to the device via a ~$2 USB host adapter cable. I have a special More

$526 USD in 7 days
(43 Reviews)

Our skillful team of designers and intelligent programmers have more than 6 years of experience in this field. We deliver 110% satisfactory quality service.---- Lets discuss on this project. Please check PMB

$226 USD in 13 days
(18 Reviews)

Hi, Please consider my bid.

$140 USD in 5 days
(5 Reviews)

Hello, check your personal message board.

$250 USD in 5 days
(3 Reviews)

I am very interested in your project and hope to work with you soon.

$166 USD in 3 days
(2 Reviews)

Expert in Iphone, Ipad and Android Development. Our more than dozen mobile developers can complete any complex project on time and within budget....

$206 USD in 3 days
(0 Reviews)

Hi. Which external device would be controlling this?

$555 USD in 7 days
(0 Reviews)

Hi kindly check your PMB thanks.

$277 USD in 10 days
(0 Reviews)

pls check pm

$206 USD in 3 days
(0 Reviews)

I can write an app for you. For suggestions please see your mailbox. Thanks.

$222 USD in 7 days
(0 Reviews)