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-rw-r--r--esp8266/Makefile2
1 files changed, 1 insertions, 1 deletions
diff --git a/esp8266/Makefile b/esp8266/Makefile
index 9a76027026..65093d819b 100644
--- a/esp8266/Makefile
+++ b/esp8266/Makefile
@@ -26,7 +26,7 @@ INC += -I$(BUILD)
INC += -I$(ESP_SDK)/include
# UART for "os" messages. 0 is normal UART as used by MicroPython REPL,
-# 1 is debug UART (tx only).
+# 1 is debug UART (tx only), -1 to disable.
UART_OS = 0
CFLAGS_XTENSA = -fsingle-precision-constant -Wdouble-promotion \