diff --git a/slsDetectorServers/eigerDetectorServer/FebControl.c b/slsDetectorServers/eigerDetectorServer/FebControl.c
index 63c67772b..608207ea6 100644
--- a/slsDetectorServers/eigerDetectorServer/FebControl.c
+++ b/slsDetectorServers/eigerDetectorServer/FebControl.c
@@ -709,6 +709,30 @@ int Feb_Control_AcquisitionInProgress() {
     return STATUS_IDLE;
 }
 
+int Feb_Control_ProcessingInProgress() {
+    unsigned int regr = 0, regl = 0;
+    // deactivated should return end of processing
+    if (!Feb_Control_activated)
+        return IDLE;
+
+    if (!Feb_Interface_ReadRegister(Feb_Control_rightAddress,
+                                    FEB_REG_STATUS, &regr)) {
+        LOG(logERROR, ("Could not read right FEB_REG_STATUS to get feb processing status\n"));
+        return STATUS_ERROR;
+    }
+    if (!Feb_Interface_ReadRegister(Feb_Control_leftAddress,
+                                    FEB_REG_STATUS, &regl)) {
+        LOG(logERROR, ("Could not read left FEB_REG_STATUS to get feb processing status\n"));
+        return STATUS_ERROR;
+    }
+    // processing done
+    if ((regr | regl) & FEB_REG_STATUS_ACQ_DONE_MSK) {
+        return STATUS_IDLE;
+    }
+    // processing running
+    return STATUS_RUNNING;    
+}
+
 int Feb_Control_AcquisitionStartedBit() {
     unsigned int status_reg_r = 0, status_reg_l = 0;
     // deactivated should return acquisition started/ready
@@ -1002,8 +1026,7 @@ int Feb_Control_StopAcquisition() {
         unsigned int orig_value = 0;
         if (!Feb_Interface_ReadRegister(Feb_Control_AddressToAll(),
                                         DAQ_REG_CTRL, &orig_value)) {
-            LOG(logERROR, ("Could not read DAQ_REG_CHIP_CMDS to send software "
-                           "trigger\n"));
+            LOG(logERROR, ("Could not read DAQ_REG_CTRL to stop acquisition (send complete frames)\n"));
             return 0;
         }
         if (!Feb_Interface_WriteRegister(Feb_Control_AddressToAll(),
@@ -1012,7 +1035,27 @@ int Feb_Control_StopAcquisition() {
             LOG(logERROR, ("Could not send last frames.\n"));
             return 0;
         }
-	usleep(100 *1000);
+        LOG(logINFOBLUE, ("send last frame value:0x%x\n", orig_value | DAQ_CTRL_STOP));
+
+        // wait for feb processing to be done
+        int is_processing = Feb_Control_ProcessingInProgress();
+        int check_error = 0;
+        while (is_processing != STATUS_IDLE) {
+            usleep(500);
+            is_processing = Feb_Control_ProcessingInProgress();
+
+            // check error only 5 times (ensuring it is not something that happens
+            // sometimes)
+            if (is_processing == STATUS_ERROR) {
+                if (check_error == 5)
+                    break;
+                check_error++;
+            } // reset check_error for next time
+            else
+                check_error = 0;
+
+        }
+    
         // stop acquisition
         return Feb_Control_Reset();
     }
@@ -1904,15 +1947,15 @@ int Feb_Control_GetLeftFPGATemp() {
     if (!Feb_Control_activated) {
         return 0;
     }
-    unsigned int temperature = 0;
+    unsigned int value = 0;
     if (!Feb_Interface_ReadRegister(Feb_Control_leftAddress, FEB_REG_STATUS,
-                                    &temperature)) {
+                                    &value)) {
         LOG(logERROR, ("Trouble reading FEB_REG_STATUS reg to get left feb "
                        "temperature\n"));
         return 0;
     }
 
-    temperature = temperature >> 16;
+    unsigned int temperature = ((value & FEB_REG_STATUS_TEMP_MSK) >> FEB_REG_STATUS_TEMP_OFST);
     temperature =
         ((((float)(temperature) / 65536.0f) / 0.00198421639f) - 273.15f) *
         1000; // Static conversation, copied from xps sysmon standalone driver
diff --git a/slsDetectorServers/eigerDetectorServer/FebControl.h b/slsDetectorServers/eigerDetectorServer/FebControl.h
index db8819c94..07921d65b 100644
--- a/slsDetectorServers/eigerDetectorServer/FebControl.h
+++ b/slsDetectorServers/eigerDetectorServer/FebControl.h
@@ -40,6 +40,7 @@ unsigned int *Feb_Control_GetTrimbits();
 
 // acquisition
 int Feb_Control_AcquisitionInProgress();
+int Feb_Control_ProcessingInProgress();
 int Feb_Control_AcquisitionStartedBit();
 int Feb_Control_WaitForStartedFlag(int sleep_time_us, int prev_flag);
 int Feb_Control_WaitForFinishedFlag(int sleep_time_us, int tempLock);
diff --git a/slsDetectorServers/eigerDetectorServer/FebRegisterDefs.h b/slsDetectorServers/eigerDetectorServer/FebRegisterDefs.h
index a5ecd79ff..6d2da9af9 100644
--- a/slsDetectorServers/eigerDetectorServer/FebRegisterDefs.h
+++ b/slsDetectorServers/eigerDetectorServer/FebRegisterDefs.h
@@ -30,7 +30,14 @@
 
 #define DAQ_REG_RO_OFFSET   20
 #define DAQ_REG_STATUS     (DAQ_REG_RO_OFFSET + 0) // also pg and fifo status register
+
 #define FEB_REG_STATUS     (DAQ_REG_RO_OFFSET + 3)
+
+#define FEB_REG_STATUS_ACQ_DONE_OFST    (6)
+#define FEB_REG_STATUS_ACQ_DONE_MSK     (0x00000001 << FEB_REG_STATUS_ACQ_DONE_OFST)
+#define FEB_REG_STATUS_TEMP_OFST        (16)
+#define FEB_REG_STATUS_TEMP_MSK         (0x0000FFFF << FEB_REG_STATUS_TEMP_OFST)
+
 #define MEAS_SUBPERIOD_REG (DAQ_REG_RO_OFFSET + 4)
 #define MEAS_PERIOD_REG    (DAQ_REG_RO_OFFSET + 5)
 // clang-format on
@@ -39,6 +46,7 @@
 #define DAQ_CTRL_START 0x40000000
 #define ACQ_CTRL_START 0x50000000 // this is 0x10000000 (acq) | 0x40000000 (daq)
 #define DAQ_CTRL_STOP  0x08000000 // sends last complete frame
+#define DAQ_CTRL_DONE  0x00000040 // data processing done in feb
 
 // direct chip commands to the DAQ_REG_CHIP_CMDS register
 #define DAQ_SET_STATIC_BIT       0x00000001
diff --git a/slsDetectorServers/eigerDetectorServer/bin/eigerDetectorServer_developer b/slsDetectorServers/eigerDetectorServer/bin/eigerDetectorServer_developer
index 7171285fa..a042dc38d 100755
Binary files a/slsDetectorServers/eigerDetectorServer/bin/eigerDetectorServer_developer and b/slsDetectorServers/eigerDetectorServer/bin/eigerDetectorServer_developer differ
diff --git a/slsDetectorServers/eigerDetectorServer/slsDetectorFunctionList.c b/slsDetectorServers/eigerDetectorServer/slsDetectorFunctionList.c
index 7551c2053..a97f93544 100644
--- a/slsDetectorServers/eigerDetectorServer/slsDetectorFunctionList.c
+++ b/slsDetectorServers/eigerDetectorServer/slsDetectorFunctionList.c
@@ -2511,6 +2511,19 @@ void readFrame(int *ret, char *mess) {
     // wait for detector to send
     int isTransmitting = 1;
     while (isTransmitting) {
+        // wait for feb processing to be done
+        int i = Feb_Control_ProcessingInProgress();
+        if (i == STATUS_ERROR) {
+            strcpy(mess, "Could not read feb processing done register\n");
+            *ret = (int)FAIL;            
+            return;
+        }       
+        if (i == RUNNING) {
+            LOG(logINFOBLUE, ("Status: TRANSMITTING (feb processing)\n"));
+            isTransmitting = 1;            
+        }
+
+        // wait for beb to send out all packets
         if (Beb_IsTransmitting(&isTransmitting, send_to_ten_gig, 1) == FAIL) {
             strcpy(mess, "Could not read delay counters\n");
             *ret = (int)FAIL;
diff --git a/slsSupportLib/include/sls/versionAPI.h b/slsSupportLib/include/sls/versionAPI.h
index 468f6a20b..026931eee 100644
--- a/slsSupportLib/include/sls/versionAPI.h
+++ b/slsSupportLib/include/sls/versionAPI.h
@@ -3,10 +3,10 @@
 #define APILIB       0x210225
 #define APIRECEIVER  0x210225
 #define APIGUI       0x210225
-#define APIEIGER 0x210621
 #define APICTB 0x210621
 #define APIGOTTHARD 0x210621
 #define APIGOTTHARD2 0x210621
 #define APIJUNGFRAU 0x210621
 #define APIMYTHEN3 0x210621
 #define APIMOENCH 0x210621
+#define APIEIGER 0x210624