From 75fd451fdb8ac77bd097ea45e352efda9987660d Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@home-assistant.io>
Date: Tue, 13 Oct 2026 09:56:38 -1000
Subject: [PATCH] [bl0939] Keep the init command table in flash

---
 esphome/components/bl0939/bl0939.cpp | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/esphome/components/bl0939/bl0939.cpp b/esphome/components/bl0939/bl0939.cpp
index e8dc09abba7..54cd86003e6 100644
--- a/esphome/components/bl0939/bl0939.cpp
+++ b/esphome/components/bl0939/bl0939.cpp
@@ -20,7 +20,7 @@ static const uint8_t BL0939_REG_SOFT_RESET = 0x19;
 static const uint8_t BL0939_REG_USR_WRPROT = 0x1A;
 static const uint8_t BL0939_REG_TPS_CTRL = 0x1B;
 
-const uint8_t BL0939_INIT[6][6] = {
+static const uint8_t BL0939_INIT[6][6] PROGMEM = {
     // Reset to default
     {BL0939_WRITE_COMMAND, BL0939_REG_SOFT_RESET, 0x5A, 0x5A, 0x5A, 0x33},
     // Enable User Operation Write
@@ -66,8 +66,10 @@ void BL0939::update() {
 }
 
 void BL0939::setup() {
-  for (auto *i : BL0939_INIT) {
-    this->write_array(i, 6);
+  uint8_t cmd[sizeof(BL0939_INIT[0])];
+  for (const auto *i : BL0939_INIT) {
+    progmem_memcpy(cmd, i, sizeof(cmd));
+    this->write_array(cmd, sizeof(cmd));
     delay(1);
   }
   this->flush();