I updated the lua code of the Wifi Scanner. It now runs with the sdk 3.0.1.
Handverdrahtet
2021-11-22
2021-10-17
Update: Display TTN-Gateway status
After migrating my TTN gateway to the new The Things Stack Community Edition (see previous blog post) my script to display the gateway status stopped working. The reason behind was, that the new stack does not provide the noc api which was used in the script.
After searching in the TTN forum I found the thread New API for gateway mapping, status and info. Using this API I just need to change one line in my script and now it works again.
- cmd = "curl -s http://noc.thethingsnetwork.org:8085/api/v2/gateways/eui-b827ebfffe06902a | jq -r '.timestamp'"
+ cmd = "curl -s https://mapper.packetbroker.net/api/v2/gateways/netID=000013,tenantID=ttn,id=eui-b827ebfffe06902a | jq -r '.updatedAt'"The updated script is available in the github repo.
Migrate TTN-Gateway to The Things Stack Community Edition (aka V3)
I just migrate my TTN-gateway to the new The Things Stack Community Edition (aka V3).
I followed the instructions I found in the thread on GitHub.
- Create a new gateway on the things network (link)
- Change the server url in your
local_conf.json
toeu1.cloud.thethings.network
- Restart the gateway
2020-10-12
Photovoltaic dashboard with Grafana
I have a SolarEdge Inverter which is monitored by a energy meter (SolarEdge SE-MTR-3Y-400V-A). The energy meter gets measurements from the inverter and measures voltage and current at the house entry point.
SolarEdge provide a monitoring service and a mobile app to monitor the system. An example is shown here:
- mbmd - to read the measurements from the inverter and energy meter
- nodered - to calculate some derived values
- mqtt - to "transport" the measurements between the apps
- telegraf - to write the measurements into influxdb
- influxdb - to store the measurements
- grafana - to display the measurements
Configuration
mbmd
pi@racknode:/etc $ more mbmd.yaml # REST api, use 127.0.0.1 to restrict to localhost api: 0.0.0.0:8080 # mqtt config mqtt: broker: my.mqtt.server:1883 topic: mbmd # user: # password: clientid: mbmd qos: 0 homie: "" # homie: homie # adapters are referenced by device adapters: - device: inverter.ip.addr:1502 # list of devices devices: - name: inverter type: SE id: 1 subdevice: 0 # use subdevice to access SunSpec subdevices - name: powermeter type: SE id: 1 subdevice: 1 # use subdevice to access SunSpec subdevices
Node-Red
Telegraf
Grafana
2020-10-03
HP MFP M754DN Fix "Scan to Network" error
My multifunction printer HP MFP M754DN has the ability to scan to a network folder. The target folder is provided by a samba server running CentOS8. It works with out problem but stops to be able to access the network folder some weeks ago.
Testing the connection on the webgui results in the message: "Cannot connect to the network folder. Ensure the shared folder name is correct."
smb.conf
file on the samba server.
server min protocol = NT1 min protocol = NT1A further analysis of my last update activities showed that this was related to the update of the samba package from samba-4.10.4-101.el8_1.x86_64 to samba-4.11.2-13.el8.x86_64.
2020-04-19
A 3d printable case for a ZigBee Gateway
In the cap is a cutout to place a neodymium magnet.
STL files are uploaded to my Thingivers account (link).
2020-03-20
Using Cucumber with Gradle with tags
build.gradle
to do this:gradle cucumber
- will run all cucumber scenarios but not these tagged with @Ignoregradle cucumber -P tags=@Smoketest
- will run all smoketests but again will ignore these with the tag @Ignore.