diff --git a/src/devices/lacrosse.c b/src/devices/lacrosse.c
index ff0348c6..5ebca4c4 100644
--- a/src/devices/lacrosse.c
+++ b/src/devices/lacrosse.c
@@ -213,11 +213,13 @@ static char *output_fields[] = {
 
 r_device lacrossetx = {
     .name           = "LaCrosse TX Temperature / Humidity Sensor",
-    .modulation     = OOK_PULSE_PWM_RAW,
-    .short_limit    = 952,
-    .long_limit     = 3000,
-    /// .reset_limit    = 32000,
-    .reset_limit    = 8000,
+    .modulation     = OOK_PULSE_PWM_PRECISE,
+    .short_limit    = 550,  // 550 us pulse + 1000 us gap is 1
+    .long_limit     = 1400, // 1400 us pulse + 1000 us gap is 0
+    .gap_limit      = 3000, // max gap is 1000 us
+    .reset_limit    = 8000, // actually: packet gap is 29000 us
+    .sync_width     = 0,    // not used
+    .tolerance      = 0,    // raw mode
     .json_callback  = &lacrossetx_callback,
     .disabled       = 0,
     .demod_arg      = 0,  // No Startbit removal