NTPClient
TimescaleDB
NTPClient | TimescaleDB | |
---|---|---|
6 | 82 | |
524 | 16,472 | |
1.5% | 0.8% | |
5.1 | 9.8 | |
22 days ago | 5 days ago | |
C++ | C | |
- | GNU General Public License v3.0 or later |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
NTPClient
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ESP8266 NTP/RTC Clock with temp
I believe this is the ntp lib I'm currently using... https://github.com/arduino-libraries/NTPClient
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How do you get time; is there a good library ;
Normally you sync the clock one or two times per day from the NTP server. Then you calculate the time from the time passed since last sync. If you are using the arduino ecosystem you can use this library. Otherwise you have to implement the NTP client and a timer based on interrupts.
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Two databases in IOT solution
I used This ntp library to insert accurate datetime for my recent ESP32 project. Super easy API, with support for each time zone. Not realistic if you already have a large program overhead.
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How do you get time; is there a good library?
By "NTP", you mean you used this library? Did you call the update() function in the loop()?
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https://np.reddit.com/r/esp8266/comments/piwwzp/fauxmo_esp8266_possibility_to_send_commands_over/hbspbpj/
#include #include /* for time server: https://github.com/arduino-libraries/NTPClient */ #include /* for alexa */ #include /* for OTA */ #include /* for OTA and timeserver */ #include /* for OTA */ #include /* for Alexa: https://github.com/me-no-dev/ESPAsyncWebServer*/ #include "fauxmoESP.h" /* for alexa */ #include "credentials.h" /* Has the config for the wifi */ #include /* for the debug output via sockets: https://github.com/Links2004/arduinoWebSockets */ fauxmoESP fauxmo; AsyncWebServer server(80); WebSocketsServer webSocket = WebSocketsServer(81); //ws debugger will run on port 81
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How to setup a Real Time Clock over the internet that can be used by esp?
You can use the NTP library with the time library from Paul Stoffregen.
TimescaleDB
- TimescaleDB: An open-source time-series SQL database
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Google Cloud Spanner is now half the cost of Amazon DynamoDB
Don't forget PostgreSQL extensions. For something like a chat log, TimescaleDB (https://www.timescale.com/) can be surprisingly efficient. It will handle partitioning for you, with additional features like data reordering, compression, and retention policies.
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How to setup Postgres master-master cluster.
Offboard it to Postgres specialists like https://www.timescale.com/
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How to Choose the Right MQTT Data Storage for Your Next Project
TimescaleDB{:target="_blank"}: an extension of PostgreSQL that adds time-series capabilities to the relational database model. It provides scalability and performance optimizations for handling large volumes of time-stamped data while maintaining the flexibility of a relational database.
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Why does the presence of a large write-only table in a PostgreSQL database cause severe performance degradation?
Have some experience with https://www.timescale.com in this context
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Opinions and Suggestions for PostgreSQL Extension under Development
What about getting in touch with commercial organisations that have products/services based on PostgreSQL? For example Timescale, EDB, and Citus Data, or really any hosting provider that offers a managed PostgreSQL service.
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I have to do about a million inserts on a table every day that is also under very frequent reads. How should I do that?
There is Timescale.
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Ask HN: It's 2023, how do you choose between MySQL and Postgres?
Friends don't let their friends choose Mysql :)
A super long time ago (decades) when I was using Oracle regularly I had to make a decision on which way to go. Although Mysql then had the mindshare I thought that Postgres was more similar to Oracle, more standards compliant, and more of a real enterprise type of DB. The rumor was also that Postgres was heavier than MySQL. Too many horror stories of lost data (MyIsam), bad transactions (MyIsam lacks transaction integrity), and the number of Mysql gotchas being a really long list influenced me.
In time I actually found out that I had underestimated one of the most important attributes of Postgres that was a huge strength over Mysql: the power of community. Because Postgres has a really superb community that can be found on Libera Chat and elsewhere, and they are very willing to help out, I think Postgres has a huge advantage over Mysql. RhodiumToad [Andrew Gierth] https://github.com/RhodiumToad & davidfetter [David Fetter] https://www.linkedin.com/in/davidfetter are incredibly helpful folks.
I don't know that Postgres' licensing made a huge difference or not but my perception is that there are a ton of 3rd party products based on Postgres but customized to specific DB needs because of the more liberalness of the PG license which is MIT/BSD derived https://www.postgresql.org/about/licence/
Some of the PG based 3rd party DBs:
Enterprise DB https://www.enterprisedb.com/ - general purpose PG with some variants
Greenplum https://greenplum.org/ - Data warehousing
Crunchydata https://www.crunchydata.com/products/hardened-postgres - high security Postgres for regulated environments
Citus https://www.citusdata.com - Distributed DB & Columnar
Timescale https://www.timescale.com/
Why Choose PG today?
If you want better ACID: Postgres
If you want more compliant SQL: Postgres
If you want more customizability to a variety of use-cases: Postgres using a variant
If you want the flexibility of using NOSQL at times: Postgres
If you want more product knowledge reusability for other backend products: Postgres
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Help with timeseries data
TimescaleDB is Postgres with extensions to automatically partition tables for fast processing of time series data.
- Postgres for time-series data
What are some alternatives?
ESPDateTime - Date Time Functions and Classes for ESP8266 and ESP32
ClickHouse - ClickHouse® is a free analytics DBMS for big data
ESPAsyncWebServer - Async Web Server for ESP8266 and ESP32
promscale - [DEPRECATED] Promscale is a unified metric and trace observability backend for Prometheus, Jaeger and OpenTelemetry built on PostgreSQL and TimescaleDB.
Time - Time library for Arduino
TDengine - TDengine is an open source, high-performance, cloud native time-series database optimized for Internet of Things (IoT), Connected Cars, Industrial IoT and DevOps.
arduinoWebSockets - arduinoWebSockets
GORM - The fantastic ORM library for Golang, aims to be developer friendly
temporal_tables - Temporal Tables PostgreSQL Extension
pgbouncer - lightweight connection pooler for PostgreSQL
Telegraf - The plugin-driven server agent for collecting & reporting metrics.
citus - Distributed PostgreSQL as an extension