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-rw-r--r--keyboards/handwired/splittest/promicro/config.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/keyboards/handwired/splittest/promicro/config.h b/keyboards/handwired/splittest/promicro/config.h
index c2a9c6002e..de2414cb7b 100644
--- a/keyboards/handwired/splittest/promicro/config.h
+++ b/keyboards/handwired/splittest/promicro/config.h
@@ -18,6 +18,9 @@
#include "config_common.h"
+// use I2C on AVR
+#define USE_I2C
+
// wiring of each half
#define MATRIX_ROW_PINS { B3 }
#define MATRIX_COL_PINS { B6 }