Weblog Ben’s HobbyCorner

There is a nice RFM12 calculator from www.technofun.org With it you get a real good idea what is going on with the RFM12 while initializing it.

Made a test with the RFM12PB, works great. First we have made a connection between two Kamami ZL15AVR boards. Sending three synchronisation bytes AA, a ‘magic’ word, and a string of characters. It is received by the other board without any problems. 434 Mhz, 134 Khz bandwidth. Without the power amplifier at this moment, we will test for distance later on. Code written in Bascom-AVR and we have to rewrite it for Bascom-8051, which has no function-command, to have it work on the other board, the iMCU7100EVB with the W7100 on it.

This is the design of an add-on board for the iMCU7100EVB-board. It puts the LCD on a proper spot above the board and adds a RFM12BP module and a few switches. There is also an extra powerplug for the Power Amplifier of the RFM12BP. Working on the Bascom-8051 code for the W7100 to create a wireless connection. The RFM12BP is capable of generating 500 mW. FSK.
BTW, have seen it with my own eyes…. Mark Alberts is working with the W7100 as well!!!

The first series of single W7100 have arrived. Building a spectacular application with it. Just wait and see…. It is a pity that we have to pay so much for just shipping and handling.

Got some servos running with Arduino. The ServoShield is from www.renbotics.com and the servos from www.seeedstudio.com
The way to connect these servos is:

Red = +5 volts

Brown = GND

Orange = Signal

Connect a external powersupply to the terminal.

Made by www.pa0kn.nl an Eagle library for the iMCU7100 from Wiznet.
IMCU_W7100.lbr

If you want to use your Arduino Duemilanove with Bascom-AVR and program it from within Bascom, these are the steps you could follow:

Copy avrdude.conf to the root of your PC

Put your USB Serial port on COM3 (Control panel)

Choose within Bascom an external programmer and type at programmer the path to the avrdude.exe include avrdude.exe
And at the parameters type:
-v -F -Cc:\avrdude.conf -p m328p -P com3 -c STK500v1 -b 57600 -Uflash:w:{FILE}:a

Now you can compile your Bascom-AVR program and send it right away from within Bascom.

Well it works. The wiz_reset has to be added (PORTC.3 = 3 on Arduino) and to get the right xtal you have to change in the Arduino-0017/hardware/cores/arduino/Makefile

F_CPU = 8000000
Don’t forget to put it back to 16000000 afterwards.

Very easy to control a few LEDs over the Internet with the Arduino, Ethernet Shield and a Breadboard. Have used the same pins as on the Red Bokito so it also should work on this device. On the pictures: a hardcopy of the browser-screen, a picture of the full assembly and a picture of the breadboard.

Bought an Arduino Duemilanove and an W5100 Ethernet Shield a few days back. Very nice board and a very nice development environment. Lots of examples on the Internet. Compared the Red Bokito schematics to the Arduino in combination with the Ethernet Shield and found out that there was only one pin that needed extra attention, the reset of the Wiz810MJ. So with an

Int wiz_reset = 3;
pinMode(wiz_reset,OUTPUT);
digitalWrite(wiz_reset,HIGH);

I got the Arduino ethernet software running on the Red Bokito.