Networking

Networking

In this week i decide to complete what’s missing in my final project, the wireless conection. I chouse for this the nRF24L01+ from Nordic to make que simple conection.

RF it’s always tricky, but with this chip i expect no problem’s. It’s a simple RF module, but have all the power including to stream music. But it’s a simple module because have, no more layers like wifi, or bluetooth. Because i want to deliver information from trash can into trash can i suspect this is the right solution. I need to confirm if

FabKit Penela

This week i decided re-make the fabkit. I inspired on satshakit

I add to it. ftdi port. and the ISP port.

Than i make it.

I have this erros’s.

I resolve them using a higher resoltuion image. 1000dpi

Vinil cutting.

• Measure the outline of the board in eagle board
• export pads and outline(dimension) as color png.
• In Roland Cutstudio import it
• Make outline.
• remove the image
• convert lines to polylines
• remove the outer lines and leave the pads and the true outline of the board.
• resize to the measure did in eagle.
• Vinil cutter force 150gf.

soldering is easy

After populate the board i solder it with hot air.

Another mistake, i not chose the right crystal foot print.

programing the board

Programing the board was a challenge. First don't work. I could not upload the arduino bootloader because i use atmega328 and not atemega328p so change signature = 0x1e 0x95 0x14; # 328 old to signature = 0x1e 0x95 0x0F; # 328p atual in avrdude.conf like said this site. After than i find that dtr on ftdi connector must have an 100nF capacitor between dtr and reset pin. I found that when you disconnect or misplace or cross the tx rx pin's, it's good politics to remove the usb, and restart the arduino. After this it work's beautifully, but i gone make another board with:

• redesign the crystal connector
• add the capacitor between dtr and reset
• make all connector's smd
• review the possibility of dual layer board

VIDEO

123 radio test

I decided use arduino and a library. Because it’s a non fail solution. After than i will gone make my c library.

So i have gone to the arduino playground find the nRF24l01. I find this simple library as a second choice.

The test was a success :)

video

Work to do

Make a breakout board with attiny44 serial gateway to this chip link link to same documentation

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Here is the link to this week files. :)