Update README.md

MobileSensorPlatform · Aug 13, 2015 · 00daff1 · 00daff1
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commit 00daff1
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/README.md b/README.md
@@ -8,8 +8,9 @@ Arduino code for reading temperatures, talking to a GPS, and logging to an SD ca
     * CLK, MISO: on 6-pin SPI header next to Arduino logo; check pinout
     * CS: 10, 4, 52 for CS0, CS1, and CS2 respectively
   * GPS/SD logging shield
-    * For GPS, switch on shield set to SoftSerial, then jumpered 7 -> 18 (TX1), 8 -> 19 (RX1) 
-    * For SD card, software SPI on 13-10, using [Adafruit SD library](https://github.com/adafruit/SD), initialized with `SD.begin(chipSelect, 11, 12, 13)`
+    * For GPS, switch on shield set to SoftSerial, then jumpered 7 -> 18 (TX1), 8 -> 19 (RX1)
+    * For SD card, software SPI on 13-11, 9, using [Adafruit SD library](https://github.com/adafruit/SD), initialized with `SD.begin(9, 11, 12, 13)`
+    * Modify shield: cut trace right next to pin 10 on underside of shield. Jump pin 9 to hole labeled CS.
   * XBee shield
     * Switch set to DLINE
     * Blobs for pins 2, 3 desoldered