jenkinsfile - watch screen test 5 put tail in a loop

api/Jenkinsfile.ble_test

@@ -73,7 +73,9 @@ pipeline {
                         cd /opt/ble-test/ble_api/api
                         screen -dmS ble_test_${env.TEST_HASH} bash -c "cd /opt/ble-test/ble_api/api && python3 -u ./ble.py ${params.test_count} | tee /tmp/ble_test_${env.TEST_HASH}.log"
                         sleep 2
-                        tail -f /tmp/ble_test_${env.TEST_HASH}.log
+                        while screen -list | grep -q ble_test_${env.TEST_HASH}; do
+                            tail -f /tmp/ble_test_${env.TEST_HASH}.log
+                        done
                     """
                 }
             }