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31  Using Arduino / Networking, Protocols, and Devices / Re: WiFly Configuration Process - No response to $$$ on: August 27, 2012, 12:46:20 pm

Really stuck on this to be honest.
32  Using Arduino / Networking, Protocols, and Devices / Re: WiFly Configuration Process - No response to $$$ on: August 24, 2012, 11:38:13 am
Will do. Yea a Wifly Arduino Sheild
33  Using Arduino / Installation & Troubleshooting / Re: WiFly Shield on: August 24, 2012, 11:17:30 am

Currently I am in he same sort of situation as you where.

I have a wifly on my arduino.

In the serial monitored i received information from the board but when i require to go into  CMD, (by typing $$$) nothing happens.

In fact when i type any command it will not do anything with it. I have recently made a post about it please see:,119951.0.html

I will implement what you post says and fingers crossed it will sort it.

Many thanks
34  Using Arduino / Networking, Protocols, and Devices / WiFly Configuration Process - No response to $$$ on: August 24, 2012, 10:07:05 am
Hi All.

Currently I have a Wifly on my arduino uno.

The configuration process involves using the serial monitor to send '$$$' to set the wifi shield into command mode. (From there i can tell it what to do)

I send the command $$$ but get no response. (I should get 'CMD')

The device is connected since I get:

Starting WebTime - Please wait.
RAM :1226
Arduino Rx Pin (connect to WiFly Tx)smiley-mad
Arduino Tx Pin (connect to WiFly Rx):1

So i type $$$ in carriage return.. but receive nothing.

When i send a command i see a LED light on the arduino (a message is being sent from my pc to it)

Has anyone come across a problem like this?

I have tried various libraries/examples etc.

Do I need to set my arduino into a reset mode or something?

I just cant get into command mode on the wifly.

Many thanks

[My Hardware: Arduino Uno (USB)
Wifly RN-131C]

35  Using Arduino / Networking, Protocols, and Devices / Re: 2 Signals + Wifly to iPad on: August 21, 2012, 01:44:44 pm
As a note to add:

I have the Wifly library ready in arduino. (Currently head scratching for the next step)
36  Using Arduino / Networking, Protocols, and Devices / 2 Signals + Wifly to iPad on: August 21, 2012, 01:40:37 pm
Hi all, i'm looking for a bit of guidance:

As stated in the title I would like to transmit 2 signals (off a arduino uno + wifly) onto a devise like a iPad.

My area of uncertainty is way to go from the transmission to the receiver.

I have my Wifly piggybacked onto the arduino.

I suppose the questions are:
1. Wifly set up. (How do i tell the Wifly the channels of interest, or channels to send. (Eg serialprint))
2. Receiving the data on a wifi receiver. (Can i do this by utilizing the built in wifi transceiver in products like iPads?)
3. Displaying the data. (Processing program is what I have in mind)

I have checked out some tutorials but I feel this project is not as complex as some. I only want to go from:

Wifly--->View results on screen.

Thanks for you time, any links of guidance that you recommend would be much appreciated.

Kind regards.
37  Using Arduino / Networking, Protocols, and Devices / Re: Wifi Shield Choice on: August 19, 2012, 09:24:16 am
The shipping times for the official arduino wifi shield is approx 15days+ (sadface)

Ive been looking at the Arduino WiFly Shield, looks like it should do the job? (readily available)
38  Using Arduino / Networking, Protocols, and Devices / Wifi Shield Choice on: August 19, 2012, 07:36:08 am
Greetings all,

Currently I have Arduino Uno R3 and was wondering what shield to use to wirelessly transmit some data?

I'm aware Arduino have released their own wifi shield.

Essentially, I need to do is transmit two analog signals on a wifi network for later processing.

Could anyone suggest a shield that may be suitable for me?

Many thanks,
39  Using Arduino / Sensors / Re: Sensor Calibration Scan after a Button Input on: August 06, 2012, 06:20:37 pm
Many thanks for the reply Krodal.

"millis_now" was the command I was after! smiley (Wish i knew about it before)

I appreciate your response, I can finally finish what I was doing.

Kind regards,
40  Using Arduino / Sensors / Re: Amplify small voltage signal on: August 04, 2012, 08:00:04 pm
I suggest AD620 amp chip for instrumentation amplification.

As you are probably aware, use this in the wheatstone bridge configuration.

41  Using Arduino / Sensors / Re: Measure distance or direction with accelerometer? on: August 04, 2012, 07:51:58 pm
From the description i'm not quite sure on the application but be aware that:

Displacement is the double integral of a Raw Acceleration in a given time period.

Measuring displacements with accelerometers is possible yes.

But, please consider the behaviors differences of piezo vs strain gauge accelerometers in low to high frequencies. (Ie, piezo types are not responsive to low frequencies (>50Hz) or changes in direction, if you are considering measuring a humans foot step it can be assumed that one footstep =~1Hz, this is low and I very much doubt peizo accels would give you any good data.)

Kind regards,
42  Using Arduino / Sensors / Sensor Calibration Scan after a Button Input on: August 04, 2012, 06:55:40 pm
First off, massive respect to those who spent their time helping on the forums.

Personally I have learnt so much from troubleshooting using the forum search bar, a big thanks.

My problem. (I'm assuming it will be a easy fix)

I have a loadcell +amp chip, achieving good signals.

My system currently calibrates itself on start up. (I physically cycle the load cell)

[while (millis() < 5000) {
    sensorValue0 = analogRead(sensorPin0);

    // record the maximum sensor value
    if (sensorValue0 > sensorMax0) {
      sensorMax0 = sensorValue0; }

    // record the minimum sensor value
    if (sensorValue0 < sensorMin0) {
      sensorMin0 = sensorValue0;  }

I then map the values for the processing i require.

I do not have the experience to define a calibration sequence (for a time period, like 5 seconds) after a button demand.

I have done all the relevant tutorials but I cannot find something that works.

My button command will have to be a analog signal, just to make things a little more awkward. Eg:

buttonState = analogRead(A3);
if (buttonState > 1000) {   Do something}


To summarise - How do I calibrate a sensor for a given time period after a command?

A flow chart along the lines of:

[Button Pressed]  -> [Start calibration 'scan'] -> [5secs delay]-> [Stop Cal scan]->[Generate Min and Max Values]

Kind regards,
Calibration-Noob Will.
43  Using Arduino / Sensors / Re: Processing 2 Analogue Inputs To Create Differential Value on: August 04, 2012, 06:35:20 pm
Many thanks all,

I've implemented a lot of what has been discussed.

Kind regards,
44  Using Arduino / Installation & Troubleshooting / Re: Have I blown my board in Tanzania? on: July 29, 2012, 10:55:17 am
This solution worked for me:

Before uploading:

1. Disconnect all earths to the board. (Ie the GND wires going into your board - disconnecting your board)

2. Reset the Board

3. Upload

4. Connect Ground (manually poke the wire back in)

5. Reset.

I hope it helps.

45  Using Arduino / Sensors / Re: Processing 2 Analogue Inputs To Create Differential Value on: July 25, 2012, 04:54:33 pm
Thanks Mike.

Much appreciated.
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