diff --git a/CMakeLists.txt b/CMakeLists.txt
index 249656b..23ff690 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -130,6 +130,7 @@ set(SRC_FILES
 	communication/packet/flexraypacket.cpp
 	communication/packet/canpacket.cpp
 	communication/packet/ethernetpacket.cpp
+	communication/packet/versionpacket.cpp
 	communication/packet/iso9141packet.cpp
 	communication/decoder.cpp
 	communication/encoder.cpp
diff --git a/communication/communication.cpp b/communication/communication.cpp
index 53c4055..d1714ac 100644
--- a/communication/communication.cpp
+++ b/communication/communication.cpp
@@ -12,6 +12,7 @@
 #include "icsneo/communication/message/serialnumbermessage.h"
 #include "icsneo/communication/message/filter/main51messagefilter.h"
 #include "icsneo/communication/message/readsettingsmessage.h"
+#include "icsneo/communication/message/versionmessage.h"
 
 using namespace icsneo;
 
@@ -118,7 +119,6 @@ bool Communication::getSettingsSync(std::vector<uint8_t>& data, std::chrono::mil
 }
 
 std::shared_ptr<SerialNumberMessage> Communication::getSerialNumberSync(std::chrono::milliseconds timeout) {
-	sendCommand(Command::RequestSerialNumber);
 	std::shared_ptr<Message> msg = waitForMessageSync([this]() {
 		return sendCommand(Command::RequestSerialNumber);
 	}, Main51MessageFilter(Command::RequestSerialNumber), timeout);
@@ -132,6 +132,37 @@ std::shared_ptr<SerialNumberMessage> Communication::getSerialNumberSync(std::chr
 	return std::dynamic_pointer_cast<SerialNumberMessage>(m51);
 }
 
+optional< std::vector< optional<DeviceAppVersion> > > Communication::getVersionsSync(std::chrono::milliseconds timeout) {
+	std::vector< optional<DeviceAppVersion> > ret;
+
+	std::shared_ptr<Message> msg = waitForMessageSync([this]() {
+		return sendCommand(Command::GetMainVersion);
+	}, Main51MessageFilter(Command::GetMainVersion), timeout);
+	if(!msg) // Did not receive a message
+		return nullopt;
+
+	auto ver = std::dynamic_pointer_cast<VersionMessage>(msg);
+	if(!ver) // Could not upcast for some reason
+		return nullopt;
+
+	if(!ver->MainChip || ver->Versions.size() != 1)
+		return nullopt;
+
+	ret.push_back(ver->Versions.front());
+
+	msg = waitForMessageSync([this]() {
+		return sendCommand(Command::GetSecondaryVersions);
+	}, Main51MessageFilter(Command::GetSecondaryVersions), timeout);
+	if(msg) { // This one is allowed to fail
+		ver = std::dynamic_pointer_cast<VersionMessage>(msg);
+		if(ver && !ver->MainChip) {
+			ret.insert(ret.end(), ver->Versions.begin(), ver->Versions.end());
+		}
+	}
+
+	return ret;
+}
+
 int Communication::addMessageCallback(const MessageCallback& cb) {
 	std::lock_guard<std::mutex> lk(messageCallbacksLock);
 	messageCallbacks.insert(std::make_pair(messageCallbackIDCounter, cb));
diff --git a/communication/decoder.cpp b/communication/decoder.cpp
index 1e76ecc..802316a 100644
--- a/communication/decoder.cpp
+++ b/communication/decoder.cpp
@@ -10,6 +10,7 @@
 #include "icsneo/communication/packet/ethernetpacket.h"
 #include "icsneo/communication/packet/flexraypacket.h"
 #include "icsneo/communication/packet/iso9141packet.h"
+#include "icsneo/communication/packet/versionpacket.h"
 #include <iostream>
 
 using namespace icsneo;
@@ -179,6 +180,24 @@ bool Decoder::decode(std::shared_ptr<Message>& result, const std::shared_ptr<Pac
 							result = msg;
 							return true;
 						}
+						case Command::GetMainVersion: {
+							result = HardwareVersionPacket::DecodeMainToMessage(packet->data);
+							if(!result) {
+								report(APIEvent::Type::PacketDecodingError, APIEvent::Severity::Error);
+								return false;
+							}
+
+							return true;
+						}
+						case Command::GetSecondaryVersions: {
+							result = HardwareVersionPacket::DecodeSecondaryToMessage(packet->data);
+							if(!result) {
+								report(APIEvent::Type::PacketDecodingError, APIEvent::Severity::Error);
+								return false;
+							}
+
+							return true;
+						}
 						default:
 							auto msg = std::make_shared<Main51Message>();
 							msg->network = packet->network;
diff --git a/communication/encoder.cpp b/communication/encoder.cpp
index 33d9a90..b1d8e20 100644
--- a/communication/encoder.cpp
+++ b/communication/encoder.cpp
@@ -153,6 +153,8 @@ bool Encoder::encode(const Packetizer& packetizer, std::vector<uint8_t>& result,
 			case Command::RequestSerialNumber:
 			case Command::EnableNetworkCommunication:
 			case Command::EnableNetworkCommunicationEx:
+			case Command::GetMainVersion:
+			case Command::GetSecondaryVersions:
 				// There is a firmware handling idiosyncrasy with these commands
 				// They must be encoded in the short format
 				m51msg->forceShortFormat = true;
diff --git a/communication/packet/versionpacket.cpp b/communication/packet/versionpacket.cpp
new file mode 100644
index 0000000..7725965
--- /dev/null
+++ b/communication/packet/versionpacket.cpp
@@ -0,0 +1,37 @@
+#include "icsneo/communication/packet/versionpacket.h"
+
+using namespace icsneo;
+
+std::shared_ptr<VersionMessage> HardwareVersionPacket::DecodeMainToMessage(const std::vector<uint8_t>& bytestream) {
+	if(bytestream.size() < 3) // Not enough bytes to decode
+		return std::shared_ptr<VersionMessage>();
+
+	auto msg = std::make_shared<VersionMessage>(true);
+
+	optional<DeviceAppVersion>& version = msg->Versions.emplace_back();
+	version.emplace();
+	version->major = bytestream[1];
+	version->minor = bytestream[2];
+
+	return msg;
+}
+
+std::shared_ptr<VersionMessage> HardwareVersionPacket::DecodeSecondaryToMessage(const std::vector<uint8_t>& bytestream) {
+	auto msg = std::make_shared<VersionMessage>(false);
+
+	size_t bytesLeft = bytestream.size();
+	if(bytesLeft)
+		bytesLeft--; // Disregard command byte
+	while(bytesLeft >= 3) {
+		const bool versionValid = bytestream[bytestream.size() - bytesLeft + 0];
+		optional<DeviceAppVersion>& version = msg->Versions.emplace_back();
+		if(versionValid) {
+			version.emplace();
+			version->major = bytestream[bytestream.size() - bytesLeft + 1];
+			version->minor = bytestream[bytestream.size() - bytesLeft + 2];
+		}
+		bytesLeft -= std::min<size_t>(3, bytesLeft);
+	}
+
+	return msg;
+}
diff --git a/device/device.cpp b/device/device.cpp
index 1c4f19f..e4e4fd2 100644
--- a/device/device.cpp
+++ b/device/device.cpp
@@ -267,6 +267,8 @@ bool Device::open(OpenFlags flags, OpenStatusHandler handler) {
 }
 
 APIEvent::Type Device::attemptToBeginCommunication() {
+	versions.clear();
+
 	if(!afterCommunicationOpen()) {
 		// Very unlikely, at the time of writing this only fails if rawWrite does.
 		// If you're looking for this error, you're probably looking for if(!serial) below.
@@ -287,6 +289,13 @@ APIEvent::Type Device::attemptToBeginCommunication() {
 	std::string currentSerial = getNeoDevice().serial;
 	if(currentSerial != serial->deviceSerial)
 		return APIEvent::Type::IncorrectSerialNumber;
+
+	auto maybeVersions = com->getVersionsSync();
+	if(!maybeVersions)
+		return getCommunicationNotEstablishedError();
+	else
+		versions = std::move(*maybeVersions);
+
 	return APIEvent::Type::NoErrorFound;
 }
 
diff --git a/include/icsneo/communication/command.h b/include/icsneo/communication/command.h
index a45bce7..62599b2 100644
--- a/include/icsneo/communication/command.h
+++ b/include/icsneo/communication/command.h
@@ -9,11 +9,13 @@ enum class Command : uint8_t {
 	EnableNetworkCommunication = 0x07,
 	EnableNetworkCommunicationEx = 0x08,
 	RequestSerialNumber = 0xA1,
+	GetMainVersion = 0xA3, // Previously known as RED_CMD_APP_VERSION_REQ
 	SetSettings = 0xA4, // Previously known as RED_CMD_SET_BAUD_REQ, follow up with SaveSettings to write to EEPROM
 	//GetSettings = 0xA5, // Previously known as RED_CMD_READ_BAUD_REQ, now unused
 	SaveSettings = 0xA6,
 	UpdateLEDState = 0xA7,
 	SetDefaultSettings = 0xA8, // Follow up with SaveSettings to write to EEPROM
+	GetSecondaryVersions = 0xA9, // Previously known as RED_CMD_PERIPHERALS_APP_VERSION_REQ, versions other than the main chip
 	RequestStatusUpdate = 0xBC,
 	ReadSettings = 0xC7, // Previously known as 3G_READ_SETTINGS_EX
 	MiscControl = 0xE7,
diff --git a/include/icsneo/communication/communication.h b/include/icsneo/communication/communication.h
index 60859b9..5f428cd 100644
--- a/include/icsneo/communication/communication.h
+++ b/include/icsneo/communication/communication.h
@@ -9,6 +9,7 @@
 #include "icsneo/communication/packet.h"
 #include "icsneo/communication/message/callback/messagecallback.h"
 #include "icsneo/communication/message/serialnumbermessage.h"
+#include "icsneo/device/deviceversion.h"
 #include "icsneo/api/eventmanager.h"
 #include "icsneo/communication/packetizer.h"
 #include "icsneo/communication/encoder.h"
@@ -53,6 +54,7 @@ public:
 	virtual bool sendCommand(Command cmd, std::vector<uint8_t> arguments = {});
 	bool getSettingsSync(std::vector<uint8_t>& data, std::chrono::milliseconds timeout = std::chrono::milliseconds(50));
 	std::shared_ptr<SerialNumberMessage> getSerialNumberSync(std::chrono::milliseconds timeout = std::chrono::milliseconds(50));
+	optional< std::vector< optional<DeviceAppVersion> > > getVersionsSync(std::chrono::milliseconds timeout = std::chrono::milliseconds(50));
 	
 	int addMessageCallback(const MessageCallback& cb);
 	bool removeMessageCallback(int id);
diff --git a/include/icsneo/communication/message/versionmessage.h b/include/icsneo/communication/message/versionmessage.h
new file mode 100644
index 0000000..f6ca828
--- /dev/null
+++ b/include/icsneo/communication/message/versionmessage.h
@@ -0,0 +1,27 @@
+#ifndef __VERSIONMESSAGE_H_
+#define __VERSIONMESSAGE_H_
+
+#ifdef __cplusplus
+
+#include "icsneo/communication/message/message.h"
+#include "icsneo/device/deviceversion.h"
+#include "icsneo/platform/optional.h"
+
+namespace icsneo {
+
+class VersionMessage : public Message {
+public:
+	VersionMessage(bool main) : MainChip(main) { network = Network::NetID::Main51; }
+
+	// If true, the included version is for the main chip
+	const bool MainChip;
+
+	// nullopt here indicates invalid
+	std::vector< optional<DeviceAppVersion> > Versions;
+};
+
+}
+
+#endif // __cplusplus
+
+#endif
\ No newline at end of file
diff --git a/include/icsneo/communication/packet/versionpacket.h b/include/icsneo/communication/packet/versionpacket.h
new file mode 100644
index 0000000..53abb83
--- /dev/null
+++ b/include/icsneo/communication/packet/versionpacket.h
@@ -0,0 +1,21 @@
+#ifndef __VERSIONPACKET_H__
+#define __VERSIONPACKET_H__
+
+#ifdef __cplusplus
+
+#include "icsneo/communication/message/versionmessage.h"
+#include <cstdint>
+#include <memory>
+
+namespace icsneo {
+
+struct HardwareVersionPacket {
+	static std::shared_ptr<VersionMessage> DecodeMainToMessage(const std::vector<uint8_t>& bytestream);
+	static std::shared_ptr<VersionMessage> DecodeSecondaryToMessage(const std::vector<uint8_t>& bytestream);
+};
+
+}
+
+#endif // __cplusplus
+
+#endif
\ No newline at end of file
diff --git a/include/icsneo/device/device.h b/include/icsneo/device/device.h
index 2217bd8..b10fd0b 100644
--- a/include/icsneo/device/device.h
+++ b/include/icsneo/device/device.h
@@ -15,6 +15,7 @@
 #include "icsneo/device/idevicesettings.h"
 #include "icsneo/device/nullsettings.h"
 #include "icsneo/device/devicetype.h"
+#include "icsneo/device/deviceversion.h"
 #include "icsneo/communication/communication.h"
 #include "icsneo/communication/packetizer.h"
 #include "icsneo/communication/encoder.h"
@@ -210,6 +211,11 @@ public:
 	NODISCARD("If the Lifetime is not held, disconnects will be immediately unsuppressed")
 	Lifetime suppressDisconnects();
 
+	/**
+	 * For use by extensions only. A more stable API will be provided in the future.
+	 */
+	const std::vector<optional<DeviceAppVersion>>& getVersions() const { return versions; }
+
 	/**
 	 * Some alternate communication protocols do not support DFU
 	 */
@@ -328,6 +334,7 @@ protected:
 private:
 	neodevice_t data;
 	std::shared_ptr<ResetStatusMessage> latestResetStatus;
+	std::vector<optional<DeviceAppVersion>> versions;
 
 	mutable std::mutex extensionsLock;
 	std::vector<std::shared_ptr<DeviceExtension>> extensions;
diff --git a/include/icsneo/device/deviceversion.h b/include/icsneo/device/deviceversion.h
new file mode 100644
index 0000000..3a6fa48
--- /dev/null
+++ b/include/icsneo/device/deviceversion.h
@@ -0,0 +1,24 @@
+#ifndef __DEVICEVERSION_H_
+#define __DEVICEVERSION_H_
+
+#ifdef __cplusplus
+
+#include "icsneo/platform/optional.h"
+#include <cstdint>
+#include <array>
+
+namespace icsneo {
+
+struct DeviceAppVersion {
+	uint8_t major = 0;
+	uint8_t minor = 0;
+
+	bool operator!=(const DeviceAppVersion& rhs) const { return major != rhs.major || minor != rhs.minor; }
+};
+
+} // namespace icsneo
+
+
+#endif // __cplusplus
+
+#endif
\ No newline at end of file