For this reasons, I strongly recommend to start with the traditional WiFi setup and get it working first, before upgrading to the dual radio setup. Another disadvantage is that you don't get a visual indication on the R2 Touch app when the link is on (there is no "green indicator" in this mode). The setup is far more complex on the transmitter side: you need the external XBee radio, a small interface board, and an external battery to power the interface board and the external radio. Website, it was made in working when I first plugged in, but after a couple of calculations, jammed or something. FRIDEN DW10 Calculator Cord Manual Description Dw10 Friden 1953 Vintage Calculator. The link is instant-on as soon as you power your R2. Product Attributes: brandfriden, modeldw10, power sourceac, sku1569103003203292, mpndw10, typescalculator cord manual. Another major benefit is that you don't need to monkey with the WiFi settings of your phone to connect to your R2. I have never suffered a disconnection with this setup even at very large and crowded venues. The external radio is much more powerful and linked uniquely to your R2, providing a very robust link.
It uses an external XBee radio connected to the iPhone instead of the iPhone WiFi. A more advanced and robust alternative is to use a dedicated Xbee to Xbee link, as described here. However, when the WiFi space becomes very polluted, such as in large conventions, you can run into connection reliability problems. The major advantage of this is simplicity and ease of use. The standard R2 Touch/MarcDuino installation requires a single WiFi radio on the Marcduino side, and uses the built-in iPhone WiFi to connect to it.
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