diff --git a/flasher/README.md b/flasher/README.md
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+# COOL FLASHER
+
+With coolFlasher.sh you can send config to the shadow when you flash your board !
+
+
+## Prerequisites:
+
+ - aws cli
+If you haven't, contact your admin for credentials. Then follow those instructions :
+   - `pip install awscli`
+   - `aws configure`: https://docs.aws.amazon.com/cli/latest/userguide/cli-chap-welcome.html
+- your board is plugged and in _load_ mode
+- platformIO
+
+You always need to use option -e [...] for environnement and you can use -s [...] to flash SPIFFS (configuration) if you use this option you need to give your macAddress ([A-Z0-9]) ex: 32AEA4583D84.
+
+## Example :
+
+I want to flash only the code:
+
+`flasher/flasher.sh -e debug`
+
+i want to flash the code, the configuration and to send it to the shadow:
+
+`flash/flasher.sh -e debug -s 32AEA4583D84`
+
diff --git a/flasher/coolFlasher.sh b/flasher/coolFlasher.sh
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+#!/bin/bash
+if [ ${#} -lt 2 ]
+then
+    echo $'Usage : ./coolFlasher.sh -e [env] -s [macAddress] (optionnal) for more information read flasher/README.md\n\n  -e [...]        choose compilation environnement [minified, prod, debug, trace]\n  -s [...]        flash SPIFFS and send configuration to aws [yourMacAddress]'
+else
+    if [ ${1} = "-e" ]
+    then
+        pio run -e $2 -t upload
+    fi
+    if [ ${#} -eq 4 ]
+    then
+        if [ ${3} = "-s" ]
+        then
+            start='{"state":{"reported":{"config":'
+            end='}}}'
+
+            general=$(<examples/WeatherStation/data/general.json)
+            aws iot-data update-thing-shadow --thing-name ${4} --payload "${start}${general}${end}" general
+            rm general
+
+            sensors=$(<examples/WeatherStation/data/sensors.json)
+            aws iot-data update-thing-shadow --thing-name ${4} --payload "${start}${sensors}${end}" sensors
+            rm sensors
+
+            if [ -r examples/WeatherStation/data/actuators.json ]
+            then
+                actuators=$(<examples/WeatherStation/data/actuators.json)
+                aws iot-data update-thing-shadow --thing-name ${4} --payload "${start}${actuators}${end}" actuators
+                rm actuators
+            fi
+            pio run -e ${2} -t uploadfs
+        fi
+    fi
+fi
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