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166  International / Deutsch / Re: mit welcher Software sind diese Schaltpläne gezeichnet? on: December 04, 2011, 12:01:00 pm
Könnte Eagle sein.

167  Using Arduino / Programming Questions / Re: Problems with Arduino IDE 1.0 and my Xbee project on: December 02, 2011, 03:59:27 pm
Would you mind showing your code?

First hint: If you use API-mode and want to transfer packets:

OLD: Serial.print(0xFF, BYTE) - NEW: Serial.write(0xFF)


OLD: (0x00, BYTE) - NEW: Serial.write((byte)0x00).

This casting thing should have been avoided in 1.0. Unfortunately it wasn't fixed.

For starters only smiley-wink

168  Using Arduino / Networking, Protocols, and Devices / Re: Need xbee system in a hurry on: December 01, 2011, 01:31:50 am
You get the XBees Series 2 almost everywhere where you also get other Arduino stuff.

In fact to join two Arduinos you almost need no library if you use transparent mode, while API mode is preferred for a sophisticated packet handling.

To connect both (UNO/ XBees) and relay data it just needs some lines of code and maybe the use of the SoftSerial library.

169  International / Deutsch / Re: Pullup 4.7 kohm on: October 19, 2011, 01:31:49 am
z.B. hier:

Einer lohnt da aber kaum allein wg. der Versandkosten. Kannst Du keinen irgendwo ausschlachten oder hast Du vielleicht einen Conrad in der Nähe?

170  International / Deutsch / Re: Datenlogger 24 Stunden on: October 17, 2011, 12:44:52 pm
Dann musst Du wahrscheinlich aber auch eine andere RTC benutzen. Die DS1307, die ich hier im Einsatz habe, gehen gerne mal 1- 1,5 Sekunden pro Tag "falsch". Aber es gibt ja genauere Uhren wie z.B. die DS3231 etc.

171  International / Deutsch / Re: Datenlogger 24 Stunden on: October 17, 2011, 07:25:20 am
Zur Not und wenn es nicht so genau sein muss, könnte man sogar mit millis() arbeiten. Einfach eine Variable mit Datum initialisieren und die millis() jeweils einen Tag hochzählen lassen und dann die Datumsvariable +1 Tag setzen. Ja, ich weiß, millis() ist nicht genau...

172  International / Deutsch / Re: Arduino aus grosser Entfernung steuern on: October 06, 2011, 09:39:25 am
XBee PRO Series 2?

173  International / Deutsch / Re: 24C64 - 64KByte EEPROM I2C on: October 03, 2011, 03:30:58 pm
Mich würde mal interessieren wie man die ganzen I²C devices unter Arduino RC1 zum Laufen bringt...

174  International / Deutsch / Re: LF33CV Spannungsregler und -3,3V ? on: October 03, 2011, 12:46:40 pm
Wie wärs denn mit einem ICL7660?

175  International / Deutsch / Re: Frage zu 2-Kanal Relais-Karte on: September 30, 2011, 12:59:07 am
Relais haben i.d.R. zwei Ausgangsoptionen "NO" (normally open) und "NC" (normally closed). Evt. mußt du die Ausgänge nur anders belegen. Ansonsten einfach die Software anpassen.

176  Using Arduino / Networking, Protocols, and Devices / Re: Xbee trouble on: September 04, 2011, 02:31:49 am
I would also recommend checking the XBees baudrate with X-CTU. Chances are, they are still configured with 19200 baud. Check the "always update firmware" box if you try to write new firmware to your XBee.

I used XBees Series 2 (no PROs) a lot w/o level-shifting connected to 5V TX Arduinos and never had any issues with it - but digi says you HAVE TO level shift. So for some time now I use a voltage divider or voltage translator ICs to get the appropriate levels for TX/ RX. And if you want to do it really proper you also have to step-up the 3.3V DOUT to Arduino RX to 5V. The are a lot of voltage translator ICs available for that.


177  International / Deutsch / Re: RFID Bausatz von Pollin mit Arduino on: August 24, 2011, 10:09:24 am
Wie wäre es denn hiermit: ?
Das kann man relativ einfach an den Arduino anschließen.

178  Using Arduino / Networking, Protocols, and Devices / Re: Xbee ADC value not correctly converted !!!! on: August 23, 2011, 03:56:43 pm
Yes, if Vcc is 3V3 then ADC input max. value is also 3V3. So for the calculation it would be 3V3/1024 * analogRead / 10.
For your example the two values in the I/O sample packet are 0x53 (MSB) and 0x00 (LSB) which is 83 in decimal.
(3V3/1024) * 83 = 0,2674 V = 267,4 mV / 10 = 26,74°C. That value might be ok if your room temperature is that high smiley-wink

According to the datasheet the LM35DZ operates from 4 to 30 volts. 3V3 is less than that - maybe that's the problem, if you get any wrong values.

How did you measure the 0.31V output? Was Vcc > 4 volts?

If you need a temperature sensor which works with 3V3, then try TMP36.

179  Using Arduino / Networking, Protocols, and Devices / Re: Xbee ADC value not correctly converted !!!! on: August 23, 2011, 10:46:54 am
Isn't the ADC voltage of series 1 XBees much higher than 1.2 volts? I personally don't use them, but I thought ADC value might be like Vcc (3V3)? It's just a guess you may have to look up the ADC (max.) input voltage to get it clear.

180  Using Arduino / Networking, Protocols, and Devices / Re: ENC28J60 china ethernet shield = can't ping/no reply. on: August 18, 2011, 01:54:40 am

I also have the same problem. I can ping the board, but no reaction with WebServerSimpleLED and the connected LED and no response with a browser.

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