[SOLVED] Wants to make a Wireless Robot that can be controlled using Mobile Phone???

[xpress_embedo]

Hello!!! Everyone i want to make a simple robot, which moves forward backward left right, based on the commands given by us to him.
It must be wireless, I don't know which module i have to take to make it wireless.

It will be best if i can control that using My Android Mobile, i am having a basic knowledge of Android Programming, and good knowledge of Micro-controller's Programming.

Can anyone suggest me which module i should use to get a good range.
I can't use GSM Module and send sms to the device because this whole process will be slow as it depends on the network availability.

Are there any WiFi to TTL Modules or something else, like Bluetooth to TTL Modules but Bluetooth will have short range.

Please suggest me to control the device wirelessly'

 

[tpetar]

See this project :
**broken link removed**

Bluetooth is usually in range of 10m-100m, but with specific module can go up to 1000m and even over that in ideal conditions.

WT41 Long Range Bluetooth Module
**broken link removed**



Best regards,
Peter

:wink:

 

[xpress_embedo]

Finally i made Wireless Robot with the help of a friend.

https://sites.google.com/site/coole...ects-available/embedded-system/wireless-robot

Will Document it fully and post soon.

 

[jayanth.devarayanadurga]

Why 4 opto isolators for 2 motors?

 

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4 Opto-Couplers are used to isolate controller pin with L293D IC.
Each Pair of Optocouplers are used to control the rotation either clockwise or anticlockwise of a single motor

Here is the Schematic Diagram.

 

[jayanth.devarayanadurga]

Yes, I analyzed that and I was updating the post and there was a power failure. You have used 2 opto's for each motor. IN1 and IN2 of L293 are isolated. If you want to control the speed of motors then you need to use EN1 and EN2 pins of L293 with PWM. You will need 2 more opto's to isolate ENx pins.

BT range is less. Make a board with BT and Zigbee. The board will receive data from Android mobile and send it through Zigbee. Another Zigbee on robot board will receive data from 1st Zigbee.

 

[xpress_embedo]

I am not using PWM to control motor speed, i am running motor at full speed.

Your Zigbee idea is very good, i will consider it to increase the range of the device.