diff --git a/eink/eink b/eink/eink
index 7a0f00c..91b49cd 160000
--- a/eink/eink
+++ b/eink/eink
@@ -1 +1 @@
-Subproject commit 7a0f00ceab04f291596d0c1064e64833b4f7a280
+Subproject commit 91b49cd536ea8542908bdfb68a6cb7164128df52
diff --git a/eink/eink.cppproj b/eink/eink.cppproj
index 0d12cc2..f021aa5 100644
--- a/eink/eink.cppproj
+++ b/eink/eink.cppproj
@@ -224,6 +224,9 @@
     <Compile Include="eink\eink.hpp">
       <SubType>compile</SubType>
     </Compile>
+    <Compile Include="eink\otp.hpp">
+      <SubType>compile</SubType>
+    </Compile>
     <Compile Include="flash\flash.hpp">
       <SubType>compile</SubType>
     </Compile>
diff --git a/eink/flash b/eink/flash
index 6edb2e5..f9014ae 160000
--- a/eink/flash
+++ b/eink/flash
@@ -1 +1 @@
-Subproject commit 6edb2e5a21e0ce58ff2df936caee8b84e240a46b
+Subproject commit f9014aea6cbbb1ea76f30148a64e6c3fc3152dcd
diff --git a/eink/main.cpp b/eink/main.cpp
index 450907b..8d5f70c 100644
--- a/eink/main.cpp
+++ b/eink/main.cpp
@@ -1,5 +1,7 @@
 #include "clock.hpp"
 
+#include <type_traits>
+
 #include "eink/eink.hpp"
 #include "flash/flash.hpp"
 #include "io/io.hpp"
@@ -13,6 +15,33 @@ REGISTER_UART0_INT_VECTORS(uart_t);
 using spi_t = eink::Spi<io::P::C4, io::P::C5, io::P::C3, io::P::C2>;
 using eink_t = eink::Eink<200, 200, spi_t, io::P::C1, io::P::C0>;
 
+void dumpOTP(eink_t &einkDisplay, uart_t &serial)
+{
+	constexpr auto printWidth = 16;
+	auto printedCnt = std::size_t{0};
+
+	einkDisplay.dumpOTP([&serial, &printedCnt](const auto &data) {
+		constexpr auto printAddress = true;
+
+		if (printedCnt > 0 && printedCnt % printWidth == 0) {
+			serial << F("\r\n");
+		}
+
+		if (printAddress && printedCnt % printWidth == 0) {
+			serial << F("0x");
+			serial.txNumber<std::size_t, 16, 4>(printedCnt);
+			serial << F(": ");
+		}
+
+		serial << F("0x");
+		serial.txNumber<std::remove_cvref_t<decltype(data)>, 16, 2>(data);
+		serial << F(", ");
+
+		++printedCnt;
+	});
+	serial << F("\r\n");
+}
+
 int main()
 {
 	uart_t serial;
@@ -33,6 +62,9 @@ int main()
 	serial << F("e-Paper draw") << F("\r\n");
 	einkDisplay.draw(RLE_IMAGE);
 
+	serial << F("e-Paper dump OTP") << F("\r\n");
+	dumpOTP(einkDisplay, serial);
+
 	serial << F("e-Paper sleep") << F("\r\n");
 	einkDisplay.sleep();