Digital and Analog Signal Wireless Tunnel (Xbee)

I can design a very robust unit for you with lots of internal status checks for robust industrial applications. This will require some careful design work a programming, which will take some time. However, I do have quite a bit of experience working with XBee devices and RF in general. I also have the equipment to properly test the complete system. Do you need single-direction communication only, or bidirectional? Bidirectional communication would be a very good idea as it can be used to implement fault detection, such as detecting an open circuit in the 4-20 mA line and indicating a fault condition on both ends of the link. It can also be used to gauge link quality at both ends by exchanging the RSSI, as opposed to only the receiver knowing about the link quality. It could also be used to detect pairing issues, such as two receivers or two transmitters being set to the same channel. This is straightforward to implement. It would also be possible to pass at least digital inputs in both directions without significant extra hardware. It would also be possible to provide a 'link good' indication and output on both ends. Also, is it necessary for the inputs and outputs to be isolated? I have some designs for an optically isolated 4-20 mA transmitter and receiver. It's trivial to build optically isolated digital inputs and outputs. Also, do the digital outputs need to be voltage outputs or switch close outputs?

hi sir i am an expert electrical engineer I can do it for you . I have read your details and can do it . please consider me for your job. I am waiting for your reply to start please reply as soon as possible regards

hi, i am an electrical engineer. i have expertise in embedded system design and Matlab. Please check my profile for my previous work experiences. I have read your project requirement and i can design this. I have experience with industrial current loops and wireless communication. I have worked with zigbee based solutions. You have specifically mention about 1W zigbee 900 module. Just to get it in you attention such modules are very expensive and cost about $80 to $120 a piece. these modules are used for very long range i,e more than 10KM. Apart from the cost of zigbee the remaining hardware would cost about $25 per unit if manufactured in bulk. i have looked through the casing and the design can be made accordingly. Thankyou for your invitation to the project. If you are intrested we can discuss the details further. Regards

i am an electronic engineer with 4 years of experience. i have worked on xbee, zigbee and other wireless modules. i can work on this project. please contact me to discuss details about your project.

Dear Sir; I would like to apply for this job I have a PhD in electronics I have 14 years engineering experience with Wide Wireless protocols for point to point and point to multipoint communications including WI-FI interface, Bluetooth 1, 2 & 3, UHF, VHF, ZigBee, 3G & 4G. I would like to schedule an interview, I am looking forward to your reply. Best regards; Bassem Fouli

MIT Grad. Completed several Freelancer exams appropriate to the project. Available time to do the project.