From 2e101a8e44b7f1bff75cc06a0597c572a8d8d152 Mon Sep 17 00:00:00 2001
From: Elias Wimmer <elias.wimmer@tuwien.ac.at>
Date: Sun, 10 Dec 2023 23:25:14 +0100
Subject: [PATCH] extmod/modonewire: Improve write timings for better
 reliability.

When using long cables for sensors on onewire e.g. ds18b20, the current
default timings are too optimistic, leading to bus failures and CRC errors.

Stable results are achieved with the timings given by
https://www.analog.com/en/technical-articles/1wire-communication-through-software.html
---
 extmod/modonewire.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/extmod/modonewire.c b/extmod/modonewire.c
index dbd519776..844418181 100644
--- a/extmod/modonewire.c
+++ b/extmod/modonewire.c
@@ -41,8 +41,8 @@
 #define TIMING_READ1  (6)
 #define TIMING_READ2  (9)
 #define TIMING_READ3  (55)
-#define TIMING_WRITE1 (10)
-#define TIMING_WRITE2 (50)
+#define TIMING_WRITE1 (6)
+#define TIMING_WRITE2 (54)
 #define TIMING_WRITE3 (10)
 
 STATIC int onewire_bus_reset(mp_hal_pin_obj_t pin) {