diff --git a/doc/source/firmware/overview.md b/doc/source/firmware/overview.md
index d2e4d69..c985e11 100644
--- a/doc/source/firmware/overview.md
+++ b/doc/source/firmware/overview.md
@@ -64,6 +64,31 @@ Running the [Mois Box], transmitting sensor data over HTTP, using the
 ::::
 :::::
 
+::::::
+
+### Open Hive
+
+All systems conceived by Open Hive. Clemens Gruber reports about the development progress
+on his personal site at http://open-hive.org/. He pioneered low-cost scale platform
+designs based on aluminium bars.
+
+:::{seealso}
+Clemens shared many resources about the [development of a low-cost, aluminium scale platform],
+see [Bee Scale Prototype 2], [Open Hive Single Scale Bar], and [Two-bars aluminium scale platform].
+:::
+
+[Bee Scale Prototype 2]: https://www.facebook.com/media/set/?set=a.10204255675971783.1073741828.1224510416&type=1&l=41802f0fee
+[development of a low-cost, aluminium scale platform]: https://community.hiveeyes.org/t/low-cost-half-only-scale-platform-aluminium/250
+[Open Hive Single Scale Bar]: https://community.hiveeyes.org/t/open-hive-scale-bar-for-single-side-weighting/595
+[Two-bars aluminium scale platform]: https://community.hiveeyes.org/t/waage-konstruktion-mit-2-wagebalken-und-130-x-30-x-22-mm-wagezellen/3033
+
+
+#### GSM, Wi-Fi
+
+::::::{grid} 1
+:margin: 0
+:padding: 0
+
 :::::{grid-item-card}
 ::::{grid} 2
 :margin: 0
@@ -73,10 +98,10 @@ Running the [Mois Box], transmitting sensor data over HTTP, using the
 :columns: 8
 [Open Hive GSM / Wi-Fi sensor node](#openhive-gsm-wifi)
 
-The firmware source code powering the [Open Hive Box] and [Open Hive WiFi Solar],
-using the [GPRSbee] GSM modem.
+Firmware powering the [Open Hive Bee Scale GSM], using a [GPRSbee] GSM
+modem, and the [Open Hive WiFi Solar], based on an [ESP8266].
 
-**Date:** 2015
+**Date:** 2014
 **Source:** [openhive-gsm-wifi.ino]
 :::
 :::{grid-item}
@@ -479,17 +504,17 @@ caption: Firmwares
 maxdepth: 1
 hidden:
 ---
-backdoor/multihop/README
-backdoor/node-pipa/README
-backdoor/node-wifi-mqtt/README
-homie/node-homie-basic/README
-homie/node-homie-lowpower/README
 moislabs/beescale-yun/README
 openhive/openhive-gsm-wifi/README
 openhive/rfm69-gateway-sdcard/README
 openhive/rfm69-gateway-uart/README
 openhive/rfm69-node/README
 openhive/scale-adjust/README
+backdoor/multihop/README
+backdoor/node-pipa/README
+backdoor/node-wifi-mqtt/README
+homie/node-homie-basic/README
+homie/node-homie-lowpower/README
 ringlabs/bienenwaage-2.0/README
 ringlabs/bienenwaage-5.0/README
 ```
diff --git a/doc/source/index.rst b/doc/source/index.rst
index 647ff9b..8c5d1d4 100644
--- a/doc/source/index.rst
+++ b/doc/source/index.rst
@@ -209,6 +209,8 @@ An example scenario how a telemetry data network can look like in a multi-sensor
 environment. In order to learn more about the Kotori message router and data historian,
 visit its documentation at :ref:`kotori`.
 
+.. Mermaid Flowcharts documentation: https://mermaid.js.org/syntax/flowchart.html
+
 .. mermaid::
 
    %%{init: {"flowchart": {"htmlLabels": false}} }%%
diff --git a/doc/source/project/backlog.rst b/doc/source/project/backlog.rst
index 7429107..110670d 100644
--- a/doc/source/project/backlog.rst
+++ b/doc/source/project/backlog.rst
@@ -44,10 +44,10 @@ Iteration 2
 
 Layout
 ------
-- [o] @mois-update
+- [o] Updates for @mois' system
 
-  - New group ``Moislabs``
-  - https://github.com/bee-mois/beescale
+  - New group ``Mois' Lab``
+  - Link to https://github.com/bee-mois/beescale
   - Update README
   - first: https://www.euse.de/wp/blog/2011/11/bienen-ueberwachen/ (8. November 2011)
   - recent: https://www.euse.de/wp/blog/2023/05/wettermessung-direkt-am-stand/ (22. Mai 2023)
@@ -60,6 +60,7 @@ Documentation
 - [o] At least, on all firmwares, you will need to configure the ``HX711_OFFSET`` and ``HX711_KNOWN_WEIGHT`` values ...
 - [o] Rename ``./openhive/rfm69-node/synopsis.dot``
 - [o] Add a flowchart to each program? Use Mermaid instead of Graphviz?
+- [o] Add Grafana embed to each program?
 - [o] Improve leftnav, with sections
 - [o] Improve section about Kotori
 - [o] Add more footer links like Discourse