added commentary

This commit is contained in:
Flavien Haas 2018-05-02 09:19:53 +02:00
parent e47b3e72b4
commit 64e57e41a2

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@ -5,4 +5,6 @@ Gateway between a weather MicroStation using LoRa modulation and a web server. T
## Attention !
Because we're using two arduino shields using SPI communication, we need to select a chip select for each shield. I decided to use D11 for the Ethernet shield (10 for the LoRa, 4 for the SD).
To do this, edit w5100.h in the default ethernet librairy in the installation folder of your arduino IDE (on windows, in administrator mode C:\Program Files (x86)\Arduino\libraries\Ethernet\src\utility\w5100.h).
To do this, edit w5100.h in the default ethernet librairy in the installation folder of your arduino IDE (on windows, in administrator mode C:\Program Files (x86)\Arduino\libraries\Ethernet\src\utility\w5100.h)
On this case, you need to change this line ``` #define ETHERNET_SHIELD_SPI_CS 10 ``` to ``` #define ETHERNET_SHIELD_SPI_CS 11 ```