Trying to show signal strength on display

Hi,
I am trying to display the signal strength of the LoRa receiver on the Oled display but when I compile I get the following error:
no matching function for call to 'drawStr(int, int, int)'
for the line:
u8g.drawStr( 0, 35, LoRa.packetRssi());
but it outputs to serial ok.
That's where I'm stuck at the moment. The next hurdle will be to also display the first 6 or so characters of the received packet and then the project will be complete.
Any ideas?
Thank you

#include <SPI.h>
#include <LoRa.h>
#include "U8glib.h"

U8GLIB_SSD1306_128X64 u8g(U8G_I2C_OPT_NONE | U8G_I2C_OPT_DEV_0); // I2C / TWI

void setup() {
  Serial.begin(115200);
  delay(10000); // I added this to give me time to open serial monitor. 
  while (!Serial);
  Serial.println("LoRa Receiver");
  if (!LoRa.begin(433E6)) {
    Serial.println("Starting LoRa failed!");
    while (1);
  }
}
void loop() {
  // try to parse packet
  int packetSize = LoRa.parsePacket();
  if (packetSize) {
    // received a packet
    Serial.print("Received packet '");
    // read packet
    while (LoRa.available()) {
      Serial.print((char)LoRa.read());
    }
    // print RSSI of packet
    Serial.print("' with RSSI ");
    Serial.println(LoRa.packetRssi());
  }
  u8g.firstPage(); 
  u8g.setFont(u8g_font_unifont);
  do {
  u8g.drawStr( 0, 22, "Hello J"); // Just a test to make sure I can display anything
  u8g.drawStr( 0, 35, LoRa.packetRssi());
  }
  while( u8g.nextPage() );
    }
no matching function for call to 'drawStr(int, int, int)'
for the line:
u8g.drawStr( 0, 35, LoRa.packetRssi());

what i see at the first line above, parameters are int, int, int
I dont know what LoRa.packetRssi() returns but at

u8g.drawStr( 0, 22, "Hello J");

you use a text for 3rd parameter.
what is the correct type?

You need to know where to look, there is a reference page for U8glib (I found it via a Google search);

And its clear in the format for u8g.drawStr is;

u8g_uint_t U8GLIB::drawStr(u8g_uint_t x, u8g_uint_t y, const char *s)

So the firast two parameters are integers, the last is a pointer to a character array.

If you find the LoRa.h file you included in your sketch, its somewhere on your PC, you will see inside it that packetRssi() returns an integer, not a pointer;

int packetRssi();

So no wonder you get an error.

Just postion the cursor, and do a;

u8g.print(LoRa.packetRssi());

I would add that the packetSnr() (signal to noise ratio) is a better indicator of how far away the LoRa signal is from failure than RSSI. RSSI becomes inconsitent at around half the range\distance you are getting.

There is a worked example of a LoRa RSSI and SNR meter, using the SSD1306 here;

Re: u8g.drawStr( 0, 22, "Hello J");
The 1st digit is for the horizontal position on the display, The 2nd is vertical, and the 3rd is the displayed string.
If you don't put in the x & Y start point it will not display.
I thought that by replacing "Hello J" with variable LoRa.packetRssi() would work. After all it does work for the serial output, where the command:
Serial.println(LoRa.packetRssi());
Gives a serial output of:
Received packet '39.37,29.21,100849,2644,-1800,15744,-5424,668,-5424,1397942' with RSSI -23
In this case it's the "-23" I'm after

srnet:
I did look at the links you provided before posting and after your reply, but could not find anything that would work. I am not that good at coding to understand it all. I tried setting the cursor but got compile errors for that too. The example of a working LoRa meter seems to output to serial which I already have working and not to a display, or am I missing something.
Thank you for the SNR tip, but first I have to get either.

Did you try the earlier suggestion ?

Just postion the cursor, and do a;

u8g.print(LoRa.packetRssi());

RedeyePete:
I did look at the links you provided before posting and after your reply, but could not find anything that would work. I am not that good at coding to understand it all.

The example of a working LoRa meter seems to output to serial which I already have working and not to a display, or am I missing something.

Well one of the example programs was named;

33_LoRa_RSSI_Checker_With_Display