From df0ca173a64e3533989feccb8bd9656eff3832eb Mon Sep 17 00:00:00 2001
From: steadramon <866195+steadramon@users.noreply.github.com>
Date: Sun, 4 Aug 2024 15:02:57 +0100
Subject: [PATCH] Use HW random

---
 ESPGeiger/src/GeigerInput/GeigerInputTest.cpp | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/ESPGeiger/src/GeigerInput/GeigerInputTest.cpp b/ESPGeiger/src/GeigerInput/GeigerInputTest.cpp
index 025f5c1..1319757 100644
--- a/ESPGeiger/src/GeigerInput/GeigerInputTest.cpp
+++ b/ESPGeiger/src/GeigerInput/GeigerInputTest.cpp
@@ -29,9 +29,13 @@ void GeigerInputTest::begin() {
 
 double GeigerInputTest::generatePoissonRand(double lambda) {
   // https://tomroelandts.com/articles/simulating-a-geiger-counter
-	double u;
-  u = random(RAND_MAX) * 1.0 / RAND_MAX;
-	return -log(1 - u) / lambda;
+  double u;
+#ifdef ESP8266
+  u = (1.0 * RANDOM_REG32) / 0xFFFFFFFF;
+#else
+  u = (1.0 * esp_random()) / 0xFFFFFFFF;
+#endif
+  return -log(1 - u) / lambda;
 }
 
 double GeigerInputTest::calcDelay() {