Update README.md

README.md

@@ -15,7 +15,7 @@ LocaPack enables the transport of:
 
 Some extra features are also avalable, such as:
 - automatic mapping/translation of coordonates between universal GNSS/locally referenced localisations,
-- movement_id, that enables extra movement information (typically based on a local accelerometer),
+- movement_id, that enables extra movement information based on another sensor (typically a local accelerometer),
 - packet sequence numbering and local timestamping, to track positions and detect missing information,
 - message hashing, to send shorter but incomplete payloads, to respect privacy.
  
@@ -28,6 +28,11 @@ A Json description of the messages is also available.
 
 ## Implementation
 
+Implementation status:
+
+- Arduino: encode/decode header, encode/decode universal GNSS packets ; example sketch with GPS receiver.
+- Node-RED: decode header, decode universal GNSS packets
+
 ### Arduino
 
 LocaPack is available as an Arduino library, to produce or decode locapack messages.
@@ -166,9 +171,9 @@ Transport of locally referenced 2D or 3D localisation. The "repère" is identifi
 
 ##### Payload general structure
 
-|    1B    | 4B  | 4B  | 0/4B | 0/4B  |    0/8B     |
-|----------|-----|-----|------|-------|-------------|
-| `header` | `x` | `y` |  `z` | `dop` | `repere_id` |
+|    1B    | 4B  | 4B  | 0/4B | 0/4B  |      0/8B       |
+|----------|-----|-----|------|-------|-----------------|
+| `header` | `x` | `y` |  `z` | `dop` | `frameofref_id` |
 
 The `x` field is a C-type float and is mandatory.
 
@@ -178,19 +183,19 @@ The `z` field is a C-type float and its presence is annouced in the `header`
 
 The `dop` field is a C-type float and its presence is annouced in the `header`
 
-The `repere_id` field is a 64-bit UID and its presence is annouced in the `header`
+The `frameofref_id` field is a 64-bit UID that identify the Frame of Reference ("le repère utilisé") and its presence is annouced in the `header`
     
 ##### Header
 
-|        1b         |         1b          |            1b              |    5b    |
-|-------------------|---------------------|----------------------------|----------|
-| `z_presence_flag` | `dop_presence_flag` |  `repere_id_presence_flag` | reserved |
+|        1b         |         1b          |               1b               |    5b    |
+|-------------------|---------------------|--------------------------------|----------|
+| `z_presence_flag` | `dop_presence_flag` |  `frameofref_id_presence_flag` | reserved |
 
 The `z_presence_flag` must be set to 1 if the `z` field is present in the packet (3D localisation).
 
 The `dop_presence_flag` must be set to 1 if the `dop` field is present in the packet.
 
-The `repere_id_presence_flag` must be set to 1 if the `repere_id` field is present in the packet.
+The `frameofref_id_presence_flag` must be set to 1 if the `frameofref_id` field is present in the packet.
 
 #### Type 2 : Inter-node proximity