Why do tombstones exist? Detailed answer

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Why do tombstones exist? Detailed answer

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Why do tombstones exist?

Thousands of years ago, ancient man started the tradition of using a pointed stone to mark a grave. The ancient people did this, obviously, in order to prevent evil spirits from leaving dead bodies where they were meant to be. Tombstones were also used to warn people about places where evil spirits lived.

Of course, over the centuries, the purpose of tombstones has changed. The Greeks decorated their tombstones with sculpture. The Jews marked their graves with stone pillars. The Egyptians built tombs and pyramids to mark the burial places of the dead.

When Christianity appeared, the designation of graves became generally accepted. Christians have chosen a cross and a circle as a symbol. The latter, for earlier generations, symbolized the sun. It was later replaced by a simple cross which is still in use today.

Author: Likum A.

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The new RAK811 radio module from RAK allows you to build a star-type radio network or implement a simple exchange between two points with a minimum of engineering costs. The module includes an SX1276 RF transceiver, a low-power STM32L151 microcontroller and allows you to organize data transmission over a distance of up to 5 kilometers in urban areas. The RAK811 differs from other LoRaWAN modules with an additional low-noise amplifier, a highly stable TCXO reference oscillator, and full shielding of all electronic components.

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LoRaWAN protocol in the 868 MHz band;
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Point-to-point mode (Lora Point to Point communication);
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Communication range up to 15 km in open space;
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Support for different frequency channels;
Customizable control interface via UART;
Simple text AT commands or native application;
Consumption 60 mA (TX); 9,9 mA (RX);
Dimensions 22x14x1,7 mm;
Operating temperature -40°C~85°C.

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