tabletStorage

os.loadAPI("ocs/apis/sensor")
inventorySensor = sensor.wrap("top")

fullTabletsKey = "0,-1,-2"
emptyTabletsKey = "0,-1,-4"

function countContent(inventoryKey)
    local sensorReading = {}
    sensorReading = inventorySensor.getTargetDetails(inventoryKey)
    --print(textutils.serialize(sensorReading))
    local content = 0
    content = sensorReading["ItemCount"]
    return content
end

while true do
    print("full tablets: " ..countContent(fullTabletsKey))
    print("empty tablets: " ..countContent(emptyTabletsKey))
    sleep(30)
end