From 1f079147c081a507d1486c3804f59a1b6df87070 Mon Sep 17 00:00:00 2001
From: SirSydom <com@sirsydom.de>
Date: Sat, 26 Feb 2022 22:40:17 +0100
Subject: [PATCH] solves #183 (#185)

get the unique id directly from flash instead using the async. SDK call.
---
 src/rp2040_arduino_platform.cpp | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/rp2040_arduino_platform.cpp b/src/rp2040_arduino_platform.cpp
index e901502..2dcb9f2 100644
--- a/src/rp2040_arduino_platform.cpp
+++ b/src/rp2040_arduino_platform.cpp
@@ -77,7 +77,14 @@ void RP2040ArduinoPlatform::setupUart()
 uint32_t RP2040ArduinoPlatform::uniqueSerialNumber()
 {
     pico_unique_board_id_t id;      // 64Bit unique serial number from the QSPI flash
-    pico_get_unique_board_id(&id);
+
+    noInterrupts();
+    rp2040.idleOtherCore();
+
+    flash_get_unique_id(id.id);         //pico_get_unique_board_id(&id);
+
+    rp2040.resumeOtherCore();
+    interrupts();
 
     // use lower 4 byte and convert to unit32_t
     uint32_t uid = ((uint32_t)(id.id[4]) << 24) | ((uint32_t)(id.id[5]) << 16) | ((uint32_t)(id.id[6]) << 8) | (uint32_t)(id.id[7]);