diff --git a/binaries/AP_FW_1.54.bin b/binaries/AP_FW_1.54.bin
index e7d55833..1de05ef5 100644
Binary files a/binaries/AP_FW_1.54.bin and b/binaries/AP_FW_1.54.bin differ
diff --git a/binaries/AP_FW_2.9.bin b/binaries/AP_FW_2.9.bin
index 4174e0df..4f7dd184 100644
Binary files a/binaries/AP_FW_2.9.bin and b/binaries/AP_FW_2.9.bin differ
diff --git a/binaries/AP_FW_Nodisplay.bin b/binaries/AP_FW_Nodisplay.bin
index 891d6ed2..44359bb9 100644
Binary files a/binaries/AP_FW_Nodisplay.bin and b/binaries/AP_FW_Nodisplay.bin differ
diff --git a/binaries/AP_FW_Pack.bin b/binaries/AP_FW_Pack.bin
index d9bf54db..f221973b 100644
Binary files a/binaries/AP_FW_Pack.bin and b/binaries/AP_FW_Pack.bin differ
diff --git a/binaries/AP_FW_Segmented_UK.bin b/binaries/AP_FW_Segmented_UK.bin
index 4f3c2ed8..ae3ce93a 100644
Binary files a/binaries/AP_FW_Segmented_UK.bin and b/binaries/AP_FW_Segmented_UK.bin differ
diff --git a/binaries/Tag_FW_1.54.bin b/binaries/Tag_FW_1.54.bin
index 64319dc2..7fb4eccc 100644
Binary files a/binaries/Tag_FW_1.54.bin and b/binaries/Tag_FW_1.54.bin differ
diff --git a/binaries/Tag_FW_2.9-uc8151.bin b/binaries/Tag_FW_2.9-uc8151.bin
index f79a7d31..eaa053d3 100644
Binary files a/binaries/Tag_FW_2.9-uc8151.bin and b/binaries/Tag_FW_2.9-uc8151.bin differ
diff --git a/binaries/Tag_FW_2.9.bin b/binaries/Tag_FW_2.9.bin
index ce312351..ec14fef9 100644
Binary files a/binaries/Tag_FW_2.9.bin and b/binaries/Tag_FW_2.9.bin differ
diff --git a/binaries/Tag_FW_4.2.bin b/binaries/Tag_FW_4.2.bin
index c6b765fa..e08cbebe 100644
Binary files a/binaries/Tag_FW_4.2.bin and b/binaries/Tag_FW_4.2.bin differ
diff --git a/binaries/Tag_FW_Pack.bin b/binaries/Tag_FW_Pack.bin
index da9eef93..c7633ddd 100644
Binary files a/binaries/Tag_FW_Pack.bin and b/binaries/Tag_FW_Pack.bin differ
diff --git a/zbs243_AP_FW/APDisplay.c b/zbs243_AP_FW/APDisplay.c
index 0f5cf282..d07ac1e4 100755
--- a/zbs243_AP_FW/APDisplay.c
+++ b/zbs243_AP_FW/APDisplay.c
@@ -12,7 +12,8 @@
 #include "comms.h"
 #include "cpu.h"
 #include "printf.h"
-#include "proto.h"
+#include "../oepl-definitions.h"
+#include "../oepl-proto.h"
 #include "radio.h"
 #include "screen.h"
 #include "timer.h"
@@ -104,4 +105,4 @@ void epdShowRun() {
 
 #endif
 
-#endif
\ No newline at end of file
+#endif
diff --git a/zbs243_AP_FW/comms.c b/zbs243_AP_FW/comms.c
index 36126866..fa53d92e 100644
--- a/zbs243_AP_FW/comms.c
+++ b/zbs243_AP_FW/comms.c
@@ -3,7 +3,7 @@
 #include <string.h>
 #include "asmUtil.h"
 #include "printf.h"
-#include "proto.h"
+#include "../oepl-definitions.h"
 #include "radio.h"
 
 static uint8_t __xdata mCommsBuf[127];
@@ -46,4 +46,4 @@ bool commsTxUnencrypted(const void __xdata *packetP, uint8_t len) {
 
 bool commsTxNoCpy(const void __xdata *packetp) {
    return radioTx(packetp);
-}
\ No newline at end of file
+}
diff --git a/zbs243_AP_FW/emulateTag.c b/zbs243_AP_FW/emulateTag.c
index c0807b7e..1443803b 100755
--- a/zbs243_AP_FW/emulateTag.c
+++ b/zbs243_AP_FW/emulateTag.c
@@ -7,12 +7,12 @@
 #include <stdint.h>
 #include <stdio.h>
 #include <string.h>
-
 #include "asmUtil.h"
 #include "comms.h"
 #include "cpu.h"
 #include "printf.h"
-#include "proto.h"
+#include "../oepl-definitions.h"
+#include "../oepl-proto.h"
 #include "radio.h"
 #include "screen.h"
 #include "timer.h"
@@ -174,4 +174,4 @@ void fakeTagCheckIn() {
     espNotifyAvailDataReq(adr, fakeTagMac);
 }
 
-#endif
\ No newline at end of file
+#endif
diff --git a/zbs243_AP_FW/main.c b/zbs243_AP_FW/main.c
index 1a28048e..8bf4745c 100755
--- a/zbs243_AP_FW/main.c
+++ b/zbs243_AP_FW/main.c
@@ -5,12 +5,15 @@
 #include <stdio.h>
 #include <string.h>
 
+#include "../oepl-definitions.h"
+#include "../oepl-proto.h"
+#include "../oepl-esp-ap-proto.h"
+
 #include "asmUtil.h"
 #include "board.h"
 #include "comms.h"
 #include "cpu.h"
 #include "printf.h"
-#include "proto.h"
 #include "radio.h"
 #include "timer.h"
 #include "uart.h"
@@ -30,7 +33,7 @@
 struct pendingData __xdata pendingDataArr[MAX_PENDING_MACS];
 
 // VERSION GOES HERE!
-uint16_t __xdata version = 0x0017;
+uint16_t __xdata version = 0x0019;
 
 #define RAW_PKT_PADDING 2
 
@@ -61,6 +64,7 @@ uint8_t *__xdata blockXferBuffer = blockbuffer;
 #define CONCURRENT_REQUEST_DELAY 1200UL * TIMER_TICKS_PER_MS
 uint32_t __xdata lastBlockRequest = 0;
 uint8_t __xdata lastBlockMac[8];
+uint8_t __xdata lastTagReturn[8];
 
 uint8_t __xdata curChannel = 11;
 uint8_t __xdata curPower = 10;
@@ -416,9 +420,32 @@ void espNotifyAPInfo() {
     countSlots();
     pr("PEN>%02X\n", curPendingData);
     pr("NOP>%02X\n", curNoUpdate);
-//#if (AP_EMULATE_TAG == 1)
-//    fakeTagCheckIn(); // removed this for now to ensure IP info is properly displayed; first tag check in now happens after the first round of housekeeping (30s)
-//#endif
+    // #if (AP_EMULATE_TAG == 1)
+    //     fakeTagCheckIn(); // removed this for now to ensure IP info is properly displayed; first tag check in now happens after the first round of housekeeping (30s)
+    // #endif
+}
+void espNotifyTagReturnData(uint8_t *src, uint8_t len) {
+    struct tagReturnData *trd = (struct tagReturnData *)(radiorxbuffer + sizeof(struct MacFrameBcast) + 1);  // oh how I'd love to pass this as an argument, but sdcc won't let me
+    struct espTagReturnData *etrd = (struct espTagReturnData *)radiotxbuffer;
+
+    if (memcmp((void *__xdata) & trd->dataVer, lastTagReturn, 8) == 0) {
+        return;
+    } else {
+        xMemCopyShort((void *__xdata)lastTagReturn, (void *__xdata) & trd->dataVer, 8);
+    }
+
+    memcpy(etrd->src, src, 8);
+    etrd->len = len;
+    memcpy((void*)etrd->returnData, trd, len);
+    addCRC(etrd, len+10);
+
+    uartTx('T');
+    uartTx('R');
+    uartTx('D');
+    uartTx('>');
+    for (uint8_t c = 0; c < len+10; c++) {
+        uartTx(((uint8_t *)etrd)[c]);
+    }
 }
 
 // process data from tag
@@ -581,6 +608,25 @@ void processXferComplete(uint8_t *buffer) {
         if (slot != -1) pendingDataArr[slot].attemptsLeft = 0;
     }
 }
+void processTagReturnData(uint8_t *buffer, uint8_t len) {
+    struct MacFrameBcast *rxframe = (struct MacFrameBcast *)buffer;
+    struct MacFrameNormal *frameHeader = (struct MacFrameNormal *)(radiotxbuffer + 1);
+
+    if (!checkCRC((buffer + sizeof(struct MacFrameBcast) + 1), len - (sizeof(struct MacFrameBcast) + 1))) {
+        return;
+    }
+    radiotxbuffer[sizeof(struct MacFrameNormal) + 1] = PKT_TAG_RETURN_DATA_ACK;
+    radiotxbuffer[0] = sizeof(struct MacFrameNormal) + 1 + RAW_PKT_PADDING;
+    memcpy(frameHeader->src, mSelfMac, 8);
+    memcpy(frameHeader->dst, rxframe->src, 8);
+    radiotxbuffer[1] = 0x41;  // fast way to set the appropriate bits
+    radiotxbuffer[2] = 0xCC;  // normal frame
+    frameHeader->seq = seq++;
+    frameHeader->pan = rxframe->srcPan;
+    radioTx(radiotxbuffer);
+
+    espNotifyTagReturnData(rxframe->src, len - (sizeof(struct MacFrameBcast) + 1));
+}
 
 // send block data to the tag
 void sendPart(uint8_t partNo) {
@@ -769,8 +815,11 @@ void main(void) {
                             processAvailDataReq(radiorxbuffer);
                         }
                         break;
+                    case PKT_TAG_RETURN_DATA:
+                        processTagReturnData(radiorxbuffer, ret);
+                        break;
                     default:
-                        pr("t=%02X\n", getPacketType(radiorxbuffer));
+                        // pr("t=%02X\n", getPacketType(radiorxbuffer));
                         break;
                 }
                 loopCount = 10000;
@@ -805,6 +854,7 @@ void main(void) {
 #if (AP_EMULATE_TAG == 1)
         fakeTagCheckIn();
 #endif
+        memset(&lastTagReturn, 0, 8);
         for (uint8_t __xdata c = 0; c < MAX_PENDING_MACS; c++) {
             if (pendingDataArr[c].attemptsLeft == 1) {
                 if (pendingDataArr[c].availdatainfo.dataType != DATATYPE_NOUPDATE) {
diff --git a/zbs243_AP_FW/proto.h b/zbs243_AP_FW/proto.h
deleted file mode 120000
index fed53c0e..00000000
--- a/zbs243_AP_FW/proto.h
+++ /dev/null
@@ -1 +0,0 @@
-../zbs243_shared/proto.h
\ No newline at end of file
diff --git a/zbs243_Tag_FW/comms.c b/zbs243_Tag_FW/comms.c
old mode 100644
new mode 100755
index 10c6557c..f309f8bc
--- a/zbs243_Tag_FW/comms.c
+++ b/zbs243_Tag_FW/comms.c
@@ -1,8 +1,6 @@
 #define __packed
 
 #include <string.h>
-
-#include "proto.h"
 #include "asmUtil.h"
 #include "printf.h"
 #include "radio.h"
diff --git a/zbs243_Tag_FW/drawing.c b/zbs243_Tag_FW/drawing.c
old mode 100644
new mode 100755
index 8e57f8b1..2480c21b
--- a/zbs243_Tag_FW/drawing.c
+++ b/zbs243_Tag_FW/drawing.c
@@ -8,7 +8,7 @@
 #include "eeprom.h"
 #include "screen.h"
 #include "printf.h"
-#include "proto.h"
+#include "../oepl-definitions.h"
 #include "screen.h"
 #include "timer.h"
 #include "userinterface.h"  // for addIcons
diff --git a/zbs243_Tag_FW/i2cdevices.c b/zbs243_Tag_FW/i2cdevices.c
index 5cc02abc..3f377000 100755
--- a/zbs243_Tag_FW/i2cdevices.c
+++ b/zbs243_Tag_FW/i2cdevices.c
@@ -17,7 +17,10 @@
 #include "i2c.h"
 #include "printf.h"
 #include "timer.h"
-#include "proto.h"
+
+#define __packed
+#include "../oepl-definitions.h"
+#include "../oepl-proto.h"
 
 extern void dump(uint8_t* __xdata a, uint16_t __xdata l);  // remove me when done
 
diff --git a/zbs243_Tag_FW/main.c b/zbs243_Tag_FW/main.c
index 69025416..c1a36f4c 100755
--- a/zbs243_Tag_FW/main.c
+++ b/zbs243_Tag_FW/main.c
@@ -12,7 +12,7 @@
 #include "i2cdevices.h"
 #include "powermgt.h"
 #include "printf.h"
-#include "proto.h"
+
 #include "radio.h"
 #include "screen.h"
 #include "settings.h"
@@ -21,6 +21,10 @@
 #include "userinterface.h"
 #include "wdt.h"
 
+#include "../oepl-definitions.h"
+#include "../oepl-proto.h"
+
+
 // #define DEBUG_MODE
 
 static const uint64_t __code __at(0x008b) mVersionRom = 0x1000011300000000ull;
@@ -255,6 +259,15 @@ void TagAssociated() {
         }
     } else {
         powerUp(INIT_RADIO);
+
+
+
+#ifdef ENABLE_RETURN_DATA
+        // example code to send data back to the AP. Up to 90 bytes can be sent in one packet
+        uint8_t __xdata blaat[2] = {0xAB, 0xBA};
+        sendTagReturnData(blaat, 2, 0x55);
+#endif
+
         avail = getShortAvailDataInfo();
         powerDown(INIT_RADIO);
     }
diff --git a/zbs243_Tag_FW/powermgt.c b/zbs243_Tag_FW/powermgt.c
index d8d5022e..d403eac9 100755
--- a/zbs243_Tag_FW/powermgt.c
+++ b/zbs243_Tag_FW/powermgt.c
@@ -15,7 +15,8 @@
 #include "i2c.h"
 #include "i2cdevices.h"
 #include "printf.h"
-#include "proto.h"
+#include "../oepl-definitions.h"
+#include "../oepl-proto.h"
 #include "radio.h"
 #include "screen.h"
 #include "settings.h"
diff --git a/zbs243_Tag_FW/powermgt.h b/zbs243_Tag_FW/powermgt.h
index e43a07ca..f93bc3a1 100755
--- a/zbs243_Tag_FW/powermgt.h
+++ b/zbs243_Tag_FW/powermgt.h
@@ -30,6 +30,8 @@
 #define VOLTAGE_CHECK_INTERVAL 288    // How often the tag should do a battery voltage check (multiplied by LONG_DATAREQ_INTERVAL)
 #define BATTERY_VOLTAGE_MINIMUM 2450  // 2600 or below is the best we can do on the EPD
 
+#define MAX_RETURN_DATA_ATTEMPTS 15
+
 // power saving when no AP's were found (scanning every X)
 #define VOLTAGEREADING_DURING_SCAN_INTERVAL 2  // how often we should read voltages; this is done every scan attempt in interval bracket 3
 #define INTERVAL_1_TIME 3600UL                 // Try every hour
diff --git a/zbs243_Tag_FW/proto.h b/zbs243_Tag_FW/proto.h
deleted file mode 120000
index fed53c0e..00000000
--- a/zbs243_Tag_FW/proto.h
+++ /dev/null
@@ -1 +0,0 @@
-../zbs243_shared/proto.h
\ No newline at end of file
diff --git a/zbs243_Tag_FW/settings.c b/zbs243_Tag_FW/settings.c
index 4e0dd0aa..12caa628 100755
--- a/zbs243_Tag_FW/settings.c
+++ b/zbs243_Tag_FW/settings.c
@@ -1,3 +1,4 @@
+#define __packed
 #include "settings.h"
 
 #include <flash.h>
@@ -7,10 +8,13 @@
 #include <stdio.h>
 #include <string.h>
 
+
 #include "asmUtil.h"
 #include "powermgt.h"
 #include "printf.h"
 #include "syncedproto.h"
+#include "../oepl-definitions.h"
+#include "../oepl-proto.h"
 
 struct tagsettings __xdata tagSettings = {0};
 extern uint8_t __xdata blockXferBuffer[];
diff --git a/zbs243_Tag_FW/settings.h b/zbs243_Tag_FW/settings.h
index 734bd403..3bd820fd 100755
--- a/zbs243_Tag_FW/settings.h
+++ b/zbs243_Tag_FW/settings.h
@@ -3,11 +3,13 @@
 
 #include <stdint.h>
 
-#define FW_VERSION 20            // version number (max 2.5.5 :) )
-#define FW_VERSION_SUFFIX "-DSLP"  // suffix, like -RC1 or whatever.
+#define FW_VERSION 21             // version number (max 2.5.5 :) )
+#define FW_VERSION_SUFFIX "-RET"  // suffix, like -RC1 or whatever.
 // #define DEBUGBLOCKS                 // uncomment to enable extra debug information on the block transfers
 // #define PRINT_LUT                   // uncomment if you want the tag to print the LUT for the current temperature bracket
 
+// #define ENABLE_RETURN_DATA  // enables the tag to send blocks of data back. Enabling this costs about 4 IRAM bytes
+
 #define SETTINGS_STRUCT_VERSION 0x01
 
 #define DEFAULT_SETTING_FASTBOOT 0
@@ -17,6 +19,7 @@
 #define DEFAULT_SETTING_LOWBATSYMBOL 1
 #define DEFAULT_SETTING_NORFSYMBOL 1
 
+/*
 struct tagsettings {
     uint8_t settingsVer;                  // the version of the struct as written to the infopage
     uint8_t enableFastBoot;               // default 0; if set, it will skip splashscreen
@@ -31,6 +34,7 @@ struct tagsettings {
     uint16_t minimumCheckInTime;          // defaults to BASE_INTERVAL from powermgt.h
     uint8_t fixedChannel;                 // default 0; if set to a valid channel number, the tag will stick to that channel
 } __packed;
+*/
 
 extern struct tagsettings tagSettings;
 
diff --git a/zbs243_Tag_FW/syncedproto.c b/zbs243_Tag_FW/syncedproto.c
index 7cb8072f..4efbb641 100755
--- a/zbs243_Tag_FW/syncedproto.c
+++ b/zbs243_Tag_FW/syncedproto.c
@@ -16,7 +16,8 @@
 #include "i2cdevices.h"
 #include "powermgt.h"
 #include "printf.h"
-#include "proto.h"
+#include "../oepl-definitions.h"
+#include "../oepl-proto.h"
 #include "radio.h"
 #include "screen.h"
 #include "settings.h"
@@ -50,7 +51,7 @@ uint8_t __xdata currentChannel = 0;
 static uint8_t __xdata inBuffer[128] = {0};
 static uint8_t __xdata outBuffer[128] = {0};
 
-extern void executeCommand(uint8_t cmd); // this is defined in main.c
+extern void executeCommand(uint8_t cmd);  // this is defined in main.c
 
 // tools
 static uint8_t __xdata getPacketType(const void *__xdata buffer) {
@@ -251,6 +252,50 @@ struct AvailDataInfo *__xdata getShortAvailDataInfo() {
     dataReqLastAttempt = DATA_REQ_MAX_ATTEMPTS;
     return NULL;
 }
+
+#ifdef ENABLE_RETURN_DATA
+static void sendTagReturnDataPacket(const uint8_t *data, uint8_t len, uint8_t type) {
+    struct MacFrameBcast __xdata *txframe = (struct MacFrameBcast *)(outBuffer + 1);
+    memset(outBuffer, 0, sizeof(struct MacFrameBcast) + sizeof(struct AvailDataReq) + 2 + 4);
+    struct tagReturnData *__xdata trd = (struct tagReturnData *)(outBuffer + 2 + sizeof(struct MacFrameBcast));
+    outBuffer[0] = sizeof(struct MacFrameBcast) + 11 + len + 1 + 2;
+    outBuffer[sizeof(struct MacFrameBcast) + 1] = PKT_TAG_RETURN_DATA;
+    memcpy(txframe->src, mSelfMac, 8);
+    txframe->fcs.frameType = 1;
+    txframe->fcs.ackReqd = 1;
+    txframe->fcs.destAddrType = 2;
+    txframe->fcs.srcAddrType = 3;
+    txframe->seq = seq++;
+    txframe->dstPan = PROTO_PAN_ID;
+    txframe->dstAddr = 0xFFFF;
+    txframe->srcPan = PROTO_PAN_ID;
+    memcpy(trd->data, data, len);
+    trd->dataType = type;
+    memcpy(&trd->dataVer, mSelfMac, 8);
+    memcpy(&trd->dataVer, data, 4);
+    addCRC(trd, 11 + len);
+    commsTxNoCpy(outBuffer);
+}
+
+bool sendTagReturnData(uint8_t __xdata *data, uint8_t len, uint8_t type) {
+    radioRxEnable(true, true);
+    uint32_t __xdata t;
+    for (uint8_t c = 0; c < MAX_RETURN_DATA_ATTEMPTS; c++) {
+        sendTagReturnDataPacket(data, len, type);
+        t = timerGet() + (TIMER_TICKS_PER_MS * DATA_REQ_RX_WINDOW_SIZE);
+        while (timerGet() < t) {
+            int8_t __xdata ret = commsRxUnencrypted(inBuffer);
+            if (ret > 1) {
+                if ((getPacketType(inBuffer) == PKT_TAG_RETURN_DATA_ACK) && (pktIsUnicast(inBuffer))) {
+                    return true;
+                }
+            }
+        }
+    }
+    return false;
+}
+#endif
+
 static bool processBlockPart(const struct blockPart *bp) {
     uint16_t __xdata start = bp->blockPart * BLOCK_PART_DATA_SIZE;
     uint16_t __xdata size = BLOCK_PART_DATA_SIZE;
diff --git a/zbs243_Tag_FW/syncedproto.h b/zbs243_Tag_FW/syncedproto.h
index e3be548d..5f6287b7 100755
--- a/zbs243_Tag_FW/syncedproto.h
+++ b/zbs243_Tag_FW/syncedproto.h
@@ -2,7 +2,7 @@
 #define SYNCED_H
 
 #include <stdint.h>
-//#include "settings.h"
+#include "settings.h"
 
 extern uint8_t __xdata mSelfMac[];
 extern uint8_t __xdata currentChannel;
@@ -13,6 +13,11 @@ extern uint8_t __xdata curImgSlot;
 extern void setupRadio(void);
 extern void killRadio(void);
 
+
+#ifdef ENABLE_RETURN_DATA
+extern bool sendTagReturnData(uint8_t __xdata *data, uint8_t len, uint8_t type);
+#endif
+
 void dump(const uint8_t *__xdata a, const uint16_t __xdata l);
 extern struct AvailDataInfo *__xdata getAvailDataInfo();
 extern struct AvailDataInfo *__xdata getShortAvailDataInfo();
diff --git a/zbs243_Tag_FW/userinterface.c b/zbs243_Tag_FW/userinterface.c
index febb7601..912ff923 100755
--- a/zbs243_Tag_FW/userinterface.c
+++ b/zbs243_Tag_FW/userinterface.c
@@ -14,7 +14,8 @@
 #include "lut.h"
 #include "powermgt.h"
 #include "printf.h"
-#include "proto.h"
+#include "../oepl-definitions.h"
+#include "../oepl-proto.h"
 #include "screen.h"
 #include "settings.h"
 #include "sleep.h"
diff --git a/zbs243_shared/board/zbs154_ssd1619/board.h b/zbs243_shared/board/zbs154_ssd1619/board.h
index 46d255ab..11ff717f 100755
--- a/zbs243_shared/board/zbs154_ssd1619/board.h
+++ b/zbs243_shared/board/zbs154_ssd1619/board.h
@@ -2,7 +2,10 @@
 #define _BOARD_H_
 
 #include <stdint.h>
-#include "proto.h"
+
+#define __packed
+#include "../oepl-definitions.h"
+
 #include "spi.h"
 
 #define eepromByte				spiByte
diff --git a/zbs243_shared/board/zbs29_ssd1619/board.h b/zbs243_shared/board/zbs29_ssd1619/board.h
index 9f1c06d7..08b56f04 100755
--- a/zbs243_shared/board/zbs29_ssd1619/board.h
+++ b/zbs243_shared/board/zbs29_ssd1619/board.h
@@ -2,7 +2,10 @@
 #define _BOARD_H_
 
 #include <stdint.h>
-#include "proto.h"
+
+#define __packed
+
+#include "../oepl-definitions.h"
 #include "spi.h"
 
 #define eepromByte				spiByte
diff --git a/zbs243_shared/board/zbs29_uc8151/board.h b/zbs243_shared/board/zbs29_uc8151/board.h
index 7ec406f0..138a3139 100755
--- a/zbs243_shared/board/zbs29_uc8151/board.h
+++ b/zbs243_shared/board/zbs29_uc8151/board.h
@@ -2,9 +2,12 @@
 #define _BOARD_H_
 
 #include <stdint.h>
-#include "proto.h"
 #include "spi.h"
 
+#define __packed
+#include "../oepl-definitions.h"
+
+
 #define eepromByte				spiByte
 #define eepromPrvSelect()		do { __asm__("nop\nnop\nnop\n"); P1_1 = 0; __asm__("nop\nnop\nnop\n"); } while(0)
 #define eepromPrvDeselect()		do { __asm__("nop\nnop\nnop\n"); P1_1 = 1; __asm__("nop\nnop\nnop\n"); } while(0)
diff --git a/zbs243_shared/board/zbs42_ssd1619/board.h b/zbs243_shared/board/zbs42_ssd1619/board.h
index e1d5519b..5cd7517f 100755
--- a/zbs243_shared/board/zbs42_ssd1619/board.h
+++ b/zbs243_shared/board/zbs42_ssd1619/board.h
@@ -2,7 +2,8 @@
 #define _BOARD_H_
 
 #include <stdint.h>
-#include "proto.h"
+#define __packed
+#include "../oepl-definitions.h"
 #include "spi.h"
 
 #define eepromByte				spiByte
diff --git a/zbs243_shared/board/zbs_nodisplay/board.h b/zbs243_shared/board/zbs_nodisplay/board.h
index c9bbe9a9..f2c8d399 100755
--- a/zbs243_shared/board/zbs_nodisplay/board.h
+++ b/zbs243_shared/board/zbs_nodisplay/board.h
@@ -2,7 +2,11 @@
 #define _BOARD_H_
 
 #include <stdint.h>
-#include "proto.h"
+
+#define __packed
+
+#include "../oepl-definitions.h"
+
 #include "spi.h"
 
 #define HAS_EEPROM 0
diff --git a/zbs243_shared/board/zbs_segmented_uk/board.h b/zbs243_shared/board/zbs_segmented_uk/board.h
index 7deb17ee..35d884ca 100755
--- a/zbs243_shared/board/zbs_segmented_uk/board.h
+++ b/zbs243_shared/board/zbs_segmented_uk/board.h
@@ -2,7 +2,8 @@
 #define _BOARD_H_
 
 #include <stdint.h>
-#include "proto.h"
+#define __packed
+#include "../oepl-definitions.h"
 #include "spi.h"
 
 #define HAS_EEPROM 0
diff --git a/zbs243_shared/proto.h b/zbs243_shared/proto.h
deleted file mode 100755
index 161a761c..00000000
--- a/zbs243_shared/proto.h
+++ /dev/null
@@ -1,209 +0,0 @@
-#ifndef _PROTO_H_
-#define _PROTO_H_
-#define __packed
-#include <stdint.h>
-
-#include "../tag_types.h"
-
-enum TagScreenType {
-    TagScreenEink_BW_1bpp,
-    TagScreenEink_BW_2bpp,
-    TagScreenEink_BW_4bpp,
-    TagScreenEink_BWY_only,  // 2bpp, but only 3 colors (BW?Y)
-    TagScreenEink_BWY_2bpp,
-    TagScreenEink_BWY_4bpp,
-    TagScreenEink_BWR_only,  // 2bpp, but only 3 colors (BW?R)
-    TagScreenEink_BWR_2bpp,
-    TagScreenEink_BWR_4bpp,
-
-    TagScreenEink_BWY_3bpp,
-    TagScreenEink_BWR_3bpp,
-    TagScreenEink_BW_3bpp,
-
-    TagScreenPersistentLcd_1bpp,
-
-    TagScreenEink_BWY_5colors,
-    TagScreenEink_BWR_5colors,
-
-    TagScreenEink_BWY_6colors,
-    TagScreenEink_BWR_6colors,
-
-    TagScreenTypeOther = 0x7f,
-};
-
-#ifndef __packed
-#define __packed __attribute__((packed))
-#endif
-
-#define PROTO_PAN_ID (0x4447)  // PAN ID compression shall be used
-
-#define RADIO_MAX_PACKET_LEN (125)  // useful payload, not including the crc
-
-#define ADDR_MODE_NONE (0)
-#define ADDR_MODE_SHORT (2)
-#define ADDR_MODE_LONG (3)
-
-#define FRAME_TYPE_BEACON (0)
-#define FRAME_TYPE_DATA (1)
-#define FRAME_TYPE_ACK (2)
-#define FRAME_TYPE_MAC_CMD (3)
-
-#define SHORT_MAC_UNUSED (0x10000000UL)  // for radioRxFilterCfg's myShortMac
-
-struct MacFcs {
-    uint8_t frameType : 3;
-    uint8_t secure : 1;
-    uint8_t framePending : 1;
-    uint8_t ackReqd : 1;
-    uint8_t panIdCompressed : 1;
-    uint8_t rfu1 : 1;
-    uint8_t rfu2 : 2;
-    uint8_t destAddrType : 2;
-    uint8_t frameVer : 2;
-    uint8_t srcAddrType : 2;
-} __packed;
-
-struct MacFrameFromMaster {
-    struct MacFcs fcs;
-    uint8_t seq;
-    uint16_t pan;
-    uint8_t dst[8];
-    uint16_t from;
-} __packed;
-
-struct MacFrameNormal {
-    struct MacFcs fcs;
-    uint8_t seq;
-    uint16_t pan;
-    uint8_t dst[8];
-    uint8_t src[8];
-} __packed;
-
-struct MacFrameBcast {
-    struct MacFcs fcs;
-    uint8_t seq;
-    uint16_t dstPan;
-    uint16_t dstAddr;
-    uint16_t srcPan;
-    uint8_t src[8];
-} __packed;
-
-#define PKT_AVAIL_DATA_SHORTREQ 0xE3
-#define PKT_AVAIL_DATA_REQ 0xE5
-#define PKT_AVAIL_DATA_INFO 0xE6
-#define PKT_BLOCK_PARTIAL_REQUEST 0xE7
-#define PKT_BLOCK_REQUEST_ACK 0xE9
-#define PKT_BLOCK_REQUEST 0xE4
-#define PKT_BLOCK_PART 0xE8
-#define PKT_XFER_COMPLETE 0xEA
-#define PKT_XFER_COMPLETE_ACK 0xEB
-#define PKT_CANCEL_XFER 0xEC
-#define PKT_PING 0xED
-#define PKT_PONG 0xEE
-
-struct AvailDataReq {
-    uint8_t checksum;
-    uint8_t lastPacketLQI;
-    int8_t lastPacketRSSI;
-    int8_t temperature;
-    uint16_t batteryMv;
-    uint8_t hwType;
-    uint8_t wakeupReason;
-    uint8_t capabilities;
-    uint16_t tagSoftwareVersion;
-    uint8_t currentChannel;
-    uint8_t customMode;
-    uint8_t reserved[8];
-} __packed;
-
-struct oldAvailDataReq {
-    uint8_t checksum;
-    uint8_t lastPacketLQI;
-    int8_t lastPacketRSSI;
-    int8_t temperature;
-    uint16_t batteryMv;
-    uint8_t hwType;
-    uint8_t wakeupReason;
-    uint8_t capabilities;
-} __packed;
-
-struct AvailDataInfo {
-    uint8_t checksum;
-    uint64_t dataVer;  // MD5 of potential traffic
-    uint32_t dataSize;
-    uint8_t dataType;
-    uint8_t dataTypeArgument;  // extra specification or instruction for the tag (LUT to be used for drawing image)
-    uint16_t nextCheckIn;      // when should the tag check-in again? Measured in minutes
-} __packed;
-
-struct pendingData {
-    struct AvailDataInfo availdatainfo;
-    uint16_t attemptsLeft;
-    uint8_t targetMac[8];
-} __packed;
-
-struct blockPart {
-    uint8_t checksum;
-    uint8_t blockId;
-    uint8_t blockPart;
-    uint8_t data[];
-} __packed;
-
-struct blockData {
-    uint16_t size;
-    uint16_t checksum;
-    uint8_t data[];
-} __packed;
-
-struct burstMacData {
-    uint16_t offset;
-    uint8_t targetMac[8];
-} __packed;
-
-#define BLOCK_PART_DATA_SIZE 99
-#define BLOCK_MAX_PARTS 42
-#define BLOCK_DATA_SIZE 4096UL
-#define BLOCK_XFER_BUFFER_SIZE BLOCK_DATA_SIZE + sizeof(struct blockData)
-#define BLOCK_REQ_PARTS_BYTES 6
-
-struct blockRequest {
-    uint8_t checksum;
-    uint64_t ver;
-    uint8_t blockId;
-    uint8_t type;
-    uint8_t requestedParts[BLOCK_REQ_PARTS_BYTES];
-} __packed;
-
-struct blockRequestAck {
-    uint8_t checksum;
-    uint16_t pleaseWaitMs;
-} __packed;
-
-struct espBlockRequest {
-    uint8_t checksum;
-    uint64_t ver;
-    uint8_t blockId;
-    uint8_t src[8];
-} __packed;
-
-struct espXferComplete {
-    uint8_t checksum;
-    uint8_t src[8];
-} __packed;
-
-struct espAvailDataReq {
-    uint8_t checksum;
-    uint8_t src[8];
-    struct AvailDataReq adr;
-} __packed;
-
-struct espSetChannelPower {
-    uint8_t checksum;
-    uint8_t channel;
-    uint8_t power;
-} __packed;
-
-#define MACFMT "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x"
-#define MACCVT(x) ((const uint8_t*)(x))[7], ((const uint8_t*)(x))[6], ((const uint8_t*)(x))[5], ((const uint8_t*)(x))[4], ((const uint8_t*)(x))[3], ((const uint8_t*)(x))[2], ((const uint8_t*)(x))[1], ((const uint8_t*)(x))[0]
-
-#endif